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vuln-cve/data/2026/20xxx/CVE-2026-20124.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-20124",
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"state": "PUBLISHED",
"assignerShortName": "cisco",
"dateReserved": "2025-10-08T11:59:15.378Z",
"datePublished": "2026-08-05T16:18:21.590Z",
"dateUpdated": "2026-08-05T17:20:47.421Z"
},
"containers": {
"cna": {
"title": "Cisco IOS XE Software SNMP Denial of Service Vulnerability",
"metrics": [
{
"format": "cvssV3_1",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
}
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to improper error handling when parsing SNMP requests. This vulnerability affects all versions of SNMP — Versions 1, 2c, and 3. An attacker could exploit this vulnerability by sending a malformed SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly. The attacker must have the SNMPv1 or v2c read-only or read-write community string or valid SNMPv3 user credentials on the affected device."
}
],
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-snmp-dos-ZAqNm4MD",
"name": "cisco-sa-iosxe-snmp-dos-ZAqNm4MD"
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
}
],
"source": {
"advisory": "cisco-sa-iosxe-snmp-dos-ZAqNm4MD",
"discovery": "EXTERNAL",
"defects": [
"CSCws90638"
]
},
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "Missing Release of Resource after Effective Lifetime",
"type": "cwe",
"cweId": "CWE-772"
}
]
}
],
"affected": [
{
"vendor": "Cisco",
"product": "Cisco IOS XE Software",
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},
{
"version": "17.12.1z5",
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},
{
"version": "17.18.1x",
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},
{
"version": "17.12.1z6",
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},
{
"version": "17.15.4d",
"status": "affected"
},
{
"version": "17.12.6b",
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},
{
"version": "17.4.1c",
"status": "affected"
},
{
"version": "17.18.1y",
"status": "affected"
}
],
"defaultStatus": "unknown"
}
],
"providerMetadata": {
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco",
"dateUpdated": "2026-08-05T16:18:21.590Z"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-05T17:20:40.573517Z",
"id": "CVE-2026-20124",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-08-05T17:20:47.421Z"
}
}
]
}
}