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Build advisory

Cisco ASA 9.9(2)235: known CVEs & fixed releases

1 CVE affects this build · highest CVSS 5.9 · newest build in its release line · updated 2026-06-23

  • MEDIUM
    CVE-2023-20081

    CVE-2023-20081

    A vulnerability in the IPv6 DHCP (DHCPv6) client module of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of DHCPv6 messages. An attacker could exploit this vulnerability by sending crafted DHCPv6 messages to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To successfully exploit this vulnerability, the attacker would need to either control the DHCPv6 server or be in a man-in-the-middle position.

    CVSS
    5.9
    EPSS
    1%
    Published
    2023-03-23
    NVD ↗Cisco ↗

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