CVE-2024-20499 (GCVE-0-2024-20499)
Vulnerability from cvelistv5
Published
2024-10-02 18:23
Modified
2025-06-04 20:19
CWE
Summary
Multiple vulnerabilities in the Cisco AnyConnect VPN server of Cisco Meraki MX and Cisco Meraki Z Series Teleworker Gateway devices could allow an unauthenticated, remote attacker to cause a DoS condition in the AnyConnect service on an affected device. These vulnerabilities are due to insufficient validation of client-supplied parameters while establishing an SSL VPN session. An attacker could exploit these vulnerabilities by sending a crafted HTTPS request to the VPN server of an affected device. A successful exploit could allow the attacker to cause the Cisco AnyConnect VPN server to restart, resulting in the failure of the established SSL VPN connections and forcing remote users to initiate a new VPN connection and reauthenticate. A sustained attack could prevent new SSL VPN connections from being established. Note: When the attack traffic stops, the Cisco AnyConnect VPN server recovers gracefully without requiring manual intervention.
Impacted products
Show details on NVD website


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            ],
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            ],
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        "metrics": [
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                "id": "CVE-2024-20499",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-02T19:03:30.783849Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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        }
      ],
      "exploits": [
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          "value": "Neither the Cisco Product Security Incident Response Team (PSIRT) nor the Cisco Meraki Incident Response Team is aware of any malicious use of the vulnerabilities that are described in this advisory."
        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
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      "providerMetadata": {
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    "cveId": "CVE-2024-20499",
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    "dateReserved": "2023-11-08T15:08:07.686Z",
    "dateUpdated": "2025-06-04T20:19:09.263Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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