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CVE-2026-73455 (GCVE-0-2026-73455)

Vulnerability from cvelistv5 – Published: 2026-09-16 09:46 – Updated: 2026-09-16 17:56
VLAI
Title
Security Advisory 0173
Summary
On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 17:56 UTC
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
References
Impacted products
Vendor Product Version CPE status
Arista Networks EOS Affected: 1.0.0 , < 4.33.0F (custom)
Affected: 4.33.0F , ≤ 4.33.8M (custom)
Affected: 4.34.0F , ≤ 4.34.6M (custom)
Affected: 4.35.0F , ≤ 4.35.4M (custom)
Affected: 4.36.0F , ≤ 4.36.0.1F (custom)
guessed Create a notification for this product.
Date Public
2026-09-09 00:00
Show details on NVD website

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                  "value": "\u003cp\u003eConfigure OSPFv3 IPsec encryption to authenticate/encrypt OSPFv3 packets.\u003c/p\u003e\n\u003cp\u003ePer-interface encryption:\u003c/p\u003e\n\u003cpre\u003e\nswitch(config)# interface \u0026lt;interface-name\u0026gt;\nswitch(config-if)# ospfv3 encryption ipsec spi \u0026lt;spi-value\u0026gt; esp aes-256-cbc sha1 passphrase \u0026lt;shared-passphrase\u0026gt;\n\u003c/pre\u003e\n\u003cp\u003ePer-area encryption:\u003c/p\u003e\n\u003cpre\u003e\nswitch(config)# router ospfv3\nswitch(config-router-ospfv3)# address-family ipv4\nswitch(config-router-ospfv3-af)# area \u0026lt;area-id\u0026gt; encryption ipsec spi \u0026lt;spi-value\u0026gt; esp aes-256-cbc sha1 passphrase \u0026lt;shared-passphrase\u0026gt;\n\u003c/pre\u003e"
                }
              ],
              "value": "Configure OSPFv3 IPsec encryption to authenticate/encrypt OSPFv3 packets.\n\nPer-interface encryption:\n\nswitch(config)# interface \u003cinterface-name\u003e\nswitch(config-if)# ospfv3 encryption ipsec spi \u003cspi-value\u003e esp aes-256-cbc sha1 passphrase \u003cshared-passphrase\u003e\n\nPer-area encryption:\n\nswitch(config)# router ospfv3\nswitch(config-router-ospfv3)# address-family ipv4\nswitch(config-router-ospfv3-af)# area \u003carea-id\u003e encryption ipsec spi \u003cspi-value\u003e esp aes-256-cbc sha1 passphrase \u003cshared-passphrase\u003e"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
        "assignerShortName": "Arista",
        "cveId": "CVE-2026-73455",
        "datePublished": "2026-09-16T09:46:15.888Z",
        "dateReserved": "2026-08-12T16:45:03.510Z",
        "dateUpdated": "2026-09-16T17:56:12.396Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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