290 lines
15 KiB
JSON
290 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-73456",
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"assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
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"state": "PUBLISHED",
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"assignerShortName": "Arista",
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"dateReserved": "2026-08-12T16:45:03.510Z",
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"datePublished": "2026-09-16T18:54:59.526Z",
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"dateUpdated": "2026-09-17T11:39:23.874Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
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"shortName": "Arista",
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"dateUpdated": "2026-09-16T18:54:59.526Z"
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},
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"title": "Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.",
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"datePublic": "2026-09-09T18:52:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-94",
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"description": "CWE-94 Improper Control of Generation of Code ('Code Injection')",
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"type": "CWE"
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}
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]
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-242",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-242 Code Injection"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Arista Networks",
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"product": "EOS",
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"platforms": [
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"710 Series",
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"720D Series",
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"720XP/722XPM Series",
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"750X Series",
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"7010TX Series",
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"7020R/R4 Series",
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"7130 Series running EOS",
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"7170 Series",
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"7050X3/X4 Series",
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"7060X/X2/X4/X5/X6 Series",
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"7260X/X3 Series",
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"7280R/R2/R3/R4 Series",
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"7300X/X3 Series",
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"7320X Series",
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"7358X4 Series",
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"7368X4 Series",
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"7388X5 Series",
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"7500R/R2/R3 Series",
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"7800R3/R4 Series",
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"7700R4 Series",
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"AWE 5000 Series",
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"AWE 7200R Series",
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"CloudEOS",
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"cEOS-lab",
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"vEOS-lab",
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"CloudVision eXchange",
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"virtual or physical appliance"
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],
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"versions": [
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{
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"status": "affected",
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"version": "4.36.0",
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"lessThanOrEqual": "4.36.1F",
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"changes": [
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{
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"at": "4.36.2F",
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"status": "unaffected"
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}
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],
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "4.35.0",
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"lessThanOrEqual": "4.35.5M",
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"changes": [
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{
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"at": "4.35.6M",
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"status": "unaffected"
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}
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],
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"versionType": "custom"
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},
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{
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"status": "affected",
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"version": "4.34.2F",
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"lessThanOrEqual": "4.34.7M",
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"changes": [
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{
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"at": "4.34.8M",
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"status": "unaffected"
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}
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],
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"versionType": "custom"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.</p>"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158",
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"tags": [
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"vendor-advisory"
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"value": "In order to be vulnerable to CVE-2026-73456, gNPSI must be enabled and one of the following conditions must be met:\n\n\n\n1. A gNPSI transport is configured to perform TLS (server verification) and metadata authentication is enabled:\n\n\n\nswitch> show management api gnpsi\nTransport: t2\nEnabled: yes\nServer: running on port 7001\nSource: sflow\nListening VRF default: ::\nSSL profile: P2, TLS configured\nAuthentication username priority: x509-spiffe, metadata, x509-common-name\n\n\n\n2. Or mTLS is enabled with x509-common-name authentication configured:\n\n\n\nswitch> show management api gnpsi\nTransport: t2\nEnabled: yes\nServer: running on port 7001\nSource: sflow\nListening VRF default: ::\nSSL profile: P2, mutual TLS configured\nAuthentication username priority: x509-spiffe, x509-common-name\n\n\n\nSystems remain unaffected if gNPSI is not enabled (default configuration):\n\n\n\nswitch> show management api gnpsi\nEnabled: no transports enabled",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>In order to be vulnerable to CVE-2026-73456, gNPSI must be enabled and one of the following conditions must be met:</p><p>1. A gNPSI transport is configured to perform TLS (server verification) and metadata authentication is enabled:</p><pre>switch> show management api gnpsi\nTransport: t2\nEnabled: yes\nServer: running on port 7001\nSource: sflow\nListening VRF default: ::\nSSL profile: P2, TLS configured\nAuthentication username priority: x509-spiffe, metadata, x509-common-name</pre><p>2. Or mTLS is enabled with x509-common-name authentication configured:</p><pre>switch> show management api gnpsi\nTransport: t2\nEnabled: yes\nServer: running on port 7001\nSource: sflow\nListening VRF default: ::\nSSL profile: P2, mutual TLS configured\nAuthentication username priority: x509-spiffe, x509-common-name</pre><p>Systems remain unaffected if gNPSI is not enabled (default configuration):</p><pre>switch> show management api gnpsi\nEnabled: no transports enabled</pre>"
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}
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]
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}
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],
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"workarounds": [
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{
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"lang": "en",
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"value": "To secure the agent against CVE-2026-73456, configure the service to use mutual TLS and enable only x509-spiffe authentication:\n\n\n\nmanagement security\n ssl profile P1\n certificate server.crt key server.key\n trust certificate ca_client.crt\n chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n transport grpc t2\n ssl profile P1\n port 7001\n authentication username priority x509-spiffe\n no disabled",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>To secure the agent against CVE-2026-73456, configure the service to use mutual TLS and enable only x509-spiffe authentication:</p><pre>management security\n ssl profile P1\n certificate server.crt key server.key\n trust certificate ca_client.crt\n chain certificate ca_signing.crt\n!\nmanagement api gnpsi\n transport grpc t2\n ssl profile P1\n port 7001\n authentication username priority x509-spiffe\n no disabled</pre>"
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}
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]
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}
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],
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"solutions": [
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{
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"lang": "en",
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"value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2026-73456 has been fixed in the following releases:\n\n * 4.36.2F and later releases in the 4.36.x train\n * 4.35.6M and later releases in the 4.35.x train\n * 4.34.8M and later releases in the 4.34.x train",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2026-73456 has been fixed in the following releases:</p><ul><li>4.36.2F and later releases in the 4.36.x train</li><li>4.35.6M and later releases in the 4.35.x train</li><li>4.34.8M and later releases in the 4.34.x train</li></ul>"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "This issue was discovered internally by Arista.",
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"type": "finder"
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}
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],
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"source": {
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"defect": [
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"1823956"
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],
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"advisory": "158",
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"discovery": "INTERNAL"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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},
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "CHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "HIGH",
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"baseSeverity": "CRITICAL",
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"baseScore": 10,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
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}
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},
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "HIGH",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "CRITICAL",
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"baseScore": 9.2,
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
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}
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}
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]
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-73456",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-09-17T03:57:34.132493Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-09-17T11:39:23.874Z"
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}
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}
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]
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}
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} |