CVE-2026-120981

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-120981", "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "state": "PUBLISHED", "assignerShortName": "Arista", "dateReserved": "2026-11-03T05:14:06.127Z", "datePublished": "2026-11-10T20:09:54.017Z", "dateUpdated": "2026-11-10T20:09:54.017Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7", "shortName": "Arista", "dateUpdated": "2026-11-10T20:09:54.017Z"}, "title": "Security Advisory 0214", "descriptions": [{"lang": "en", "value": "On affected platforms running Arista EOS with VPLS-BGP enabled, an attacker who has established a BGP session with the PE router can affect the route advertisements of VPLS pseudowires, causing a churn of the established routes with other legitimate BGP peers."}], "affected": [{"vendor": "Arista Networks", "product": "EOS", "defaultStatus": "unaffected", "versions": [{"version": "4.33.0F", "status": "affected", "versionType": "custom", "lessThanOrEqual": "4.33.10M"}, {"version": "4.34.0F", "status": "affected", "versionType": "custom", "lessThanOrEqual": "4.34.8M"}, {"version": "4.35.0F", "status": "affected", "versionType": "custom", "lessThanOrEqual": "4.35.6M"}, {"version": "4.36.0F", "status": "affected", "versionType": "custom", "lessThanOrEqual": "4.36.2F"}], "platforms": ["7280R3 Series", "7500R3 Series", "7800R3 Series"]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}, {"cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:L", "baseScore": 6, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/25036-security-advisory-0214", "tags": ["vendor-advisory"]}], "source": {"defects": ["1925302"], "advisory": "Security Advisory 0214", "discovery": "INTERNAL"}, "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-772", "description": "CWE-772 Missing Release of Resource after Effective Lifetime"}]}], "configurations": [{"lang": "en", "value": "switch>show bgp vpls signaling \nVPLS instance: CUSTOMER_1, group: BGP_MESH_1\nRoute distinguisher: 10.1.1.1:42\nRoute target to import: Route-Target-AS:65534:100\nRoute target to export: Route-Target-AS:65534:100\nLocal VE-ID: 1\nRemote VE-ID: 2, address: 10.2.2.2, encap label: 116384, decap label: 136385\nRemote VE-ID: 3, address: 10.3.3.3, encap label: 116385, decap label: 136386", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<pre>switch>show bgp vpls signaling \nVPLS instance: CUSTOMER_1, group: BGP_MESH_1\nRoute distinguisher: 10.1.1.1:42\nRoute target to import: Route-Target-AS:65534:100\nRoute target to export: Route-Target-AS:65534:100\nLocal VE-ID: 1\nRemote VE-ID: 2, address: 10.2.2.2, encap label: 116384, decap label: 136385\nRemote VE-ID: 3, address: 10.3.3.3, encap label: 116385, decap label: 136386</pre>"}]}], "impacts": [{"capecId": "CAPEC-130", "descriptions": [{"lang": "en", "value": "CAPEC-130 Excessive Allocation"}]}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["7280R3 Series", "7500R3 Series", "7800R3 Series"], "product": "EOS", "vendor": "Arista Networks", "versions": [{"lessThanOrEqual": "4.33.10M", "status": "affected", "version": "4.33.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.34.8M", "status": "affected", "version": "4.34.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.35.6M", "status": "affected", "version": "4.35.0F", "versionType": "custom"}, {"lessThanOrEqual": "4.36.2F", "status": "affected", "version": "4.36.0F", "versionType": "custom"}]}], "source": "psirt@arista.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "On affected platforms running Arista EOS with VPLS-BGP enabled, an attacker who has established a BGP session with the PE router can affect the route advertisements of VPLS pseudowires, causing a churn of the established routes with other legitimate BGP peers."}], "id": "CVE-2026-120981", "lastModified": "2026-11-12T19:24:37.847", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "psirt@arista.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.0, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "psirt@arista.com", "type": "Secondary"}]}, "published": "2026-11-10T20:18:53.360", "references": [{"source": "psirt@arista.com", "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/25036-security-advisory-0214"}], "sourceIdentifier": "psirt@arista.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "psirt@arista.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["7280r3_series", "7500r3_series", "7800r3_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.33.0F,4.33.10M]"}}, {"platform": ["7280r3_series", "7500r3_series", "7800r3_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.34.0F,4.34.8M]"}}, {"platform": ["7280r3_series", "7500r3_series", "7800r3_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.35.0F,4.35.6M]"}}, {"platform": ["7280r3_series", "7500r3_series", "7800r3_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[4.36.0F,4.36.2F]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "EOS", "source": "cna", "vendor": "Arista Networks"}, "product": "eos", "vendor": "arista"}], "created": "2026-11-11T22:15:21.806259+00:00", "title": "VPLS\u2011BGP Route Advertisement Manipulation Vulnerability in Arista EOS", "updated": "2026-11-13T09:45:18.749988+00:00", "vendors": ["arista", "arista$PRODUCT$eos"]}