{
  "document": {
    "category": "security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "publisher": {
      "category": "vendor",
      "contact_details": "support@arista.com",
      "name": "Arista PSIRT",
      "namespace": "https://www.arista.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Security advisory 214 canonical URL",
        "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/25036-security-advisory-0214"
      }
    ],
    "title": "Security Advisory 214",
    "tracking": {
      "current_release_date": "2026-11-08T09:58:19Z",
      "generator": {
        "engine": {
          "name": "Arista Networks SecEng Service CSAF Generator"
        }
      },
      "id": "Arista Networks Security Advisory 214",
      "initial_release_date": "2026-11-08T09:58:19Z",
      "revision_history": [
        {
          "date": "2026-11-08T09:58:19Z",
          "number": "1",
          "summary": "Document created"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "product_version",
                    "name": "EOS version 4.36.3",
                    "product": {
                      "name": "EOS version 4.36.3",
                      "product_id": "CSAFPID-3"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "EOS version 4.34.9",
                    "product": {
                      "name": "EOS version 4.34.9",
                      "product_id": "CSAFPID-6"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "EOS version 4.33.11",
                    "product": {
                      "name": "EOS version 4.33.11",
                      "product_id": "CSAFPID-4"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "EOS version 4.33.0",
                    "product": {
                      "name": "EOS version 4.33.0",
                      "product_id": "CSAFPID-7"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "EOS version 4.37.0",
                    "product": {
                      "name": "EOS version 4.37.0",
                      "product_id": "CSAFPID-5"
                    }
                  },
                  {
                    "category": "product_version",
                    "name": "EOS version 4.35.7",
                    "product": {
                      "name": "EOS version 4.35.7",
                      "product_id": "CSAFPID-8"
                    }
                  }
                ],
                "category": "product_name",
                "name": "EOS"
              }
            ],
            "category": "product_family",
            "name": "Software Products"
          }
        ],
        "category": "vendor",
        "name": "Arista Networks, Inc."
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-120980",
      "id": {
        "system_name": "Arista Bug ID",
        "text": "1925240"
      },
      "notes": [
        {
          "category": "description",
          "text": "On affected platforms running Arista EOS with VPLS-BGP enabled, an attacker who has established a BGP session with the PE routers can send a specially crafted BGP packet to cause the BGP agent to restart unexpectedly.",
          "title": "CVE Description"
        },
        {
          "category": "other",
          "text": "In order to be vulnerable to CVE-2026-120980 or CVE-2026-120981, the following condition must be met:\n\nVPLS using BGP signaling must be configured. The configured VPLS-BGP groups can be viewed using the `show bgp vpls signaling` command.\n\n```\nswitch>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\n```\n\nIf VPLS using BGP signaling is not configured, the \"show bgp vpls signaling\" command should produce no output.\n\n```\nswitch>show bgp vpls signaling \n```",
          "title": "1925240: Required Config for Exploitation"
        }
      ],
      "product_status": {
        "first_affected": [
          "CSAFPID-7"
        ],
        "fixed": [
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6",
          "CSAFPID-8"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "MITRE",
          "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-120980"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.33.11",
          "product_ids": [
            "CSAFPID-4"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.34.9",
          "product_ids": [
            "CSAFPID-6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.35.7",
          "product_ids": [
            "CSAFPID-8"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.36.3",
          "product_ids": [
            "CSAFPID-3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.37.0",
          "product_ids": [
            "CSAFPID-5"
          ]
        },
        {
          "category": "none_available",
          "details": "Not fixed in EOS version 4.33.0",
          "product_ids": [
            "CSAFPID-7"
          ]
        },
        {
          "category": "mitigation",
          "details": "There are no configuration-level mitigations that fully resolve this issue without upgrading software."
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-4",
            "CSAFPID-6",
            "CSAFPID-8",
            "CSAFPID-3",
            "CSAFPID-7",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-120980"
    },
    {
      "cve": "CVE-2026-120981",
      "id": {
        "system_name": "Arista Bug ID",
        "text": "1925302"
      },
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "CVE Description"
        },
        {
          "category": "other",
          "text": "In order to be vulnerable to CVE-2026-120980 or CVE-2026-120981, the following condition must be met:\n\nVPLS using BGP signaling must be configured. The configured VPLS-BGP groups can be viewed using the `show bgp vpls signaling` command.\n\n```\nswitch>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\n```\n\nIf VPLS using BGP signaling is not configured, the \"show bgp vpls signaling\" command should produce no output.\n\n```\nswitch>show bgp vpls signaling \n```",
          "title": "1925302: Required Config for Exploitation"
        }
      ],
      "product_status": {
        "first_affected": [
          "CSAFPID-7"
        ],
        "fixed": [
          "CSAFPID-3",
          "CSAFPID-4",
          "CSAFPID-5",
          "CSAFPID-6",
          "CSAFPID-8"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "MITRE",
          "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-120981"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.33.11",
          "product_ids": [
            "CSAFPID-4"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.34.9",
          "product_ids": [
            "CSAFPID-6"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.35.7",
          "product_ids": [
            "CSAFPID-8"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.36.3",
          "product_ids": [
            "CSAFPID-3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Fixed in EOS version 4.37.0",
          "product_ids": [
            "CSAFPID-5"
          ]
        },
        {
          "category": "none_available",
          "details": "Not fixed in EOS version 4.33.0",
          "product_ids": [
            "CSAFPID-7"
          ]
        },
        {
          "category": "mitigation",
          "details": "There are no configuration-level mitigations that fully resolve this issue without upgrading software."
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-4",
            "CSAFPID-6",
            "CSAFPID-8",
            "CSAFPID-3",
            "CSAFPID-7",
            "CSAFPID-5"
          ]
        }
      ],
      "title": "CVE-2026-120981"
    }
  ]
}