TNCVE-2026-20039 | Vulnetix

TNCVE-2026-20039 PUBLISHED

Record from tenable · Published March 4, 2026

A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to ineffective memory management of the VPN web server. An attacker could exploit this vulnerability by sending a large number of crafted HTTP requests to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Timeline

Mar 4, 2026 CVE Published

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vulnetix vdb vuln TNCVE-2026-20039
vulnetix vdb fixes TNCVE-2026-20039

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  "https://api.vdb.vulnetix.com/v2/vuln/TNCVE-2026-20039/fixes/registry"

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References

Tenable: CVE-2026-20039 advisory

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