295 lines
13 KiB
JSON
295 lines
13 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-2026-77696",
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"assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"state": "PUBLISHED",
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"assignerShortName": "openssl",
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"dateReserved": "2026-08-21T07:47:36.032Z",
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"datePublished": "2026-09-29T15:32:22.520Z",
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"dateUpdated": "2026-11-10T12:49:50.567Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unaffected",
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"product": "OpenSSL",
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"vendor": "OpenSSL",
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"versions": [
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{
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"lessThan": "4.0.3",
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"status": "affected",
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"version": "4.0.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.6.5",
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"status": "affected",
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"version": "3.6.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.5.9",
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"status": "affected",
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"version": "3.5.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.4.8",
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"status": "affected",
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"version": "3.4.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.0.23",
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"status": "affected",
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"version": "3.0.0",
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"versionType": "semver"
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},
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{
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"lessThan": "1.1.1zj",
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"status": "affected",
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"version": "1.1.1",
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"versionType": "custom"
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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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"type": "reporter",
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"value": "Vladimir Tokarev"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Igor Ustinov"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Viktor Dukhovni"
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}
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],
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"datePublic": "2026-09-29T14:21:57.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "Issue summary: SM2 signature generation uses non-constant-time arithmetic<br>on secret values, forming a timing side-channel.<br><br>Impact summary: An attacker able to measure SM2 signing times may learn<br>information about the per-signature secret nonce, which over many signatures<br>can, via a lattice / Hidden Number Problem attack, lead to recovery of the<br>private key.<br><br>CWE: CWE-208: Observable Timing Discrepancy<br><br>Description: SM2 signature generation computes the signature value using<br>variable-time BIGNUM operations on the secret nonce and the private key, so<br>the time taken to produce an SM2 signature depends on these secret values,<br>forming a timing side-channel.<br><br>Applications performing SM2 signature generation are affected on all<br>platforms.<br><br>FIPS Impact: no<br>SM2 is not a FIPS algorithm."
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}
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],
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"value": "Issue summary: SM2 signature generation uses non-constant-time arithmetic\non secret values, forming a timing side-channel.\n\nImpact summary: An attacker able to measure SM2 signing times may learn\ninformation about the per-signature secret nonce, which over many signatures\ncan, via a lattice / Hidden Number Problem attack, lead to recovery of the\nprivate key.\n\nCWE: CWE-208: Observable Timing Discrepancy\n\nDescription: SM2 signature generation computes the signature value using\nvariable-time BIGNUM operations on the secret nonce and the private key, so\nthe time taken to produce an SM2 signature depends on these secret values,\nforming a timing side-channel.\n\nApplications performing SM2 signature generation are affected on all\nplatforms.\n\nFIPS Impact: no\nSM2 is not a FIPS algorithm."
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}
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],
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"metrics": [
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{
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"format": "other",
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"other": {
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"content": {
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"text": "Low"
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},
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"type": "https://openssl-library.org/policies/general/security-policy/"
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-208",
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"description": "CWE-208 Observable Timing Discrepancy",
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"lang": "en",
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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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"providerMetadata": {
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"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"shortName": "openssl",
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"dateUpdated": "2026-09-29T15:32:22.520Z"
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},
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"references": [
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{
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"name": "OpenSSL Advisory",
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"tags": [
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"vendor-advisory"
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],
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"url": "https://openssl-library.org/news/secadv/20260929.txt"
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},
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{
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"name": "4.0.3 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/20b20628d39b2dcc4677194bd68c7c060fa598cb"
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},
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{
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"name": "3.6.5 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/1c4aed808a7aea32d2d013049c2e0d9fef164fc9"
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},
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{
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"name": "3.5.9 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/6b90445a56b99a328ac1feba058abf976504f440"
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},
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{
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"name": "3.4.8 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/419f5cb519721dceed393dbc524d79e487c72e64"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"title": "Timing Side-Channel in SM2 Signature Generation",
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"x_generator": {
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"engine": "Vulnogram 0.2.0"
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 3.7,
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"attackVector": "NETWORK",
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"baseSeverity": "LOW",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "HIGH",
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"availabilityImpact": "NONE",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "LOW"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-09-29T16:51:30.070097Z",
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"id": "CVE-2026-77696",
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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": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2026-09-29T16:51:33.618Z"
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}
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},
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-11-10T12:49:50.567Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.7",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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}
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],
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
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}
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]
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}
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]
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}
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} |