CVE-2025-5090 (GCVE-0-2025-5090)

Vulnerability from cvelistv5 – Published: 2026-06-05 15:49 – Updated: 2026-06-09 14:37
VLAI
Title
Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages
Summary
CVX is not resilient to unexpected messages from a connected switch. This leads to agent crashes on CVX causing instability in the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to have a high privilege access to the connected switch to be able to send custom TCP packets to the CVX.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 14:08 UTC
CWE
  • CWE-20 - Improper Input Validation
References
Impacted products
Vendor Product Version CPE status
Arista Networks EOS / CloudVision eXchange (CVX) Affected: 4.34.0F , ≤ 4.34.1F (custom)
Affected: 4.33.0M , ≤ 4.33.4M (custom)
Affected: 4.32.0M , ≤ 4.32.6M (custom)
Affected: 4.31.0 , < 4.32.0 (custom)
Affected: 4.30.0 , < 4.31.0 (custom)
guessed Create a notification for this product.
Date Public
2025-11-18 16:46
Show details on NVD website

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              "url": "https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126"
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          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eThe recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:\u003c/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4.34.2F and later releases in the 4.34.x train\u003c/li\u003e\n  \u003cli\u003e4.33.5M and later releases in the 4.33.x train\u003c/li\u003e\n  \u003cli\u003e4.32.7M and later releases in the 4.32.x train\u003c/li\u003e\n\u003c/ul\u003e"
                }
              ],
              "value": "The recommended resolution is to upgrade to a remediated software version at your earliest convenience. CVE-2025-5090 has been fixed in the following releases:\n\n\n\n    *  4.34.2F and later releases in the 4.34.x train\n\n    *  4.33.5M and later releases in the 4.33.x train\n\n    *  4.32.7M and later releases in the 4.32.x train"
            }
          ],
          "source": {
            "advisory": "0126",
            "defect": [
              "BUG1139764"
            ],
            "discovery": "INTERNAL"
          },
          "title": "Arista CloudVision Exchange Cluster Instability via Unexpected Switch Messages",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eThere is no mitigation for this issue.\u003c/p\u003e"
                }
              ],
              "value": "There is no mitigation for this issue."
            }
          ],
          "x_capecAlignment": {
            "capecId": "CAPEC-125",
            "capecName": "Flooding / Malformed Packet",
            "justification": "An attacker with high privilege access over a downstream switch can emit unexpected or malformed TCP packets causing state management code on CVX (ControllerOob/Controllerdb) to throw unhandled faults, leading to ongoing client deregistration cycles and cluster instability."
          },
          "x_generator": {
            "engine": "Vulnogram"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
        "assignerShortName": "Arista",
        "cveId": "CVE-2025-5090",
        "datePublished": "2026-06-05T15:49:27.770Z",
        "dateReserved": "2025-05-22T16:26:48.444Z",
        "dateUpdated": "2026-06-09T14:37:26.091Z",
        "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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