CVE-2009-4923: Unspecified vulnerability in the DTLS implementation on Cisco Adaptive Security Appliances (ASA) 5580 serie...

Security readout for executives and security teams

This issue affects Cisco ASA 5580 appliances running software earlier than 8.1(2). A remote attacker could trigger a denial of service in the DTLS implementation, causing a device traceback. The sources do not provide CVSS scoring or evidence of active exploitation. Exposure is limited to Cisco ASA 5580 series devices running software before 8.1(2). Risk is most relevant where the affected DTLS functionality is reachable by remote network traffic. Treat this as a targeted availability risk for legacy Cisco ASA 5580 environments. It is not supported by evidence of active exploitation in the provided sources, but affected internet-facing or remote-access appliances should be remediated promptly. Mitigation focus: Identify Cisco ASA 5580 appliances in the environment.; Confirm whether any run software earlier than 8.1(2).; Upgrade affected devices to 8.1(2) or later Cisco-fixed guidance..

Prepared

Jun 28, 2026, 02:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.