HIGH✓ PATCH🇵🇱 Wersja polska

CVE-2026-20039

CVSS 8.6v3.1pub. 2026-03-04upd. 2026-04-16

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.

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

  • Cisco Adaptive Security Appliance Software

    OS
    Cisco
    9.12.1 – 9.16.4.84 (bez)9.17.1 – 9.18.4.57 (bez)9.19.1 – 9.20.3.16 (bez)9.22.1.1 – 9.22.2.4 (bez)9.23.1 – 9.23.1.3 (bez)

  • Cisco Firepower Threat Defense Software

    APP
    Cisco
    6.4.0 – 7.0.9 (bez)7.1.0 – 7.2.10 (bez)7.3.0 – 7.4.3 (bez)7.6.0 – 7.6.1 (bez)7.7.0 – 7.7.10 (bez)
🟢
PATCH AVAILABLE
Vendor update available. Deploy in standard maintenance cycle.
Tags
DoSFirewallVPN
CWE
References

Related vulnerabilities

CVE-2025-20333CRITICAL9.9⚠ KEVPL ✓ten sam produkt

RCE jako root w Cisco ASA i FTD poprzez podatny serwer VPN web

CVE-2025-20363CRITICAL9.0PL ✓ten sam produkt

RCE w web services Cisco ASA, FTD, IOS, IOS XE, IOS XR przez HTTP

CVE-2024-20329CRITICAL9.9PL ✓ten sam produkt

RCE w podsystemie SSH Cisco ASA — wykonanie poleceń jako root

CVE-2020-3125CRITICAL9.8ten sam produkt

A vulnerability in the Kerberos authentication feature of Cisco Adaptive Security Appliance (ASA) Software cou...

CVE-2020-3187CRITICAL9.1ten sam produkt

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Fi...