8.6

CVE-2026-20135

Cisco Secure Firewall Threat Defense Software TLS 1.3 Denial of Service Vulnerability

A vulnerability in the TLS 1.3 implementation in Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.

This vulnerability is due to improper buffer management during the TLS 1.3 connection. An attacker could exploit this vulnerability by sending a crafted TLS 1.3 packet to an affected system through a TLS 1.3-enabled listening socket. A successful exploit could allow the attacker to cause the LINA process to crash, which would cause the device to reload. The reload can happen before or after authentication of the connection.Note: TLS 1.3 connections include both data traffic and user-management traffic.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerCisco
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Produkt Cisco Secure Firewall Threat Defense (FTD) Software
Default Statusunknown
Version 7.0.0
Status affected
Version 7.0.0.1
Status affected
Version 7.0.1
Status affected
Version 7.0.1.1
Status affected
Version 7.0.2
Status affected
Version 7.2.0
Status affected
Version 7.0.2.1
Status affected
Version 7.0.3
Status affected
Version 7.2.0.1
Status affected
Version 7.0.4
Status affected
Version 7.2.1
Status affected
Version 7.0.5
Status affected
Version 7.3.0
Status affected
Version 7.2.2
Status affected
Version 7.2.3
Status affected
Version 7.3.1
Status affected
Version 7.2.4
Status affected
Version 7.0.6
Status affected
Version 7.2.5
Status affected
Version 7.2.4.1
Status affected
Version 7.3.1.1
Status affected
Version 7.4.0
Status affected
Version 7.0.6.1
Status affected
Version 7.2.5.1
Status affected
Version 7.4.1
Status affected
Version 7.2.6
Status affected
Version 7.0.6.2
Status affected
Version 7.4.1.1
Status affected
Version 7.2.7
Status affected
Version 7.2.5.2
Status affected
Version 7.3.1.2
Status affected
Version 7.2.8
Status affected
Version 7.6.0
Status affected
Version 7.4.2
Status affected
Version 7.2.8.1
Status affected
Version 7.0.6.3
Status affected
Version 7.4.2.1
Status affected
Version 7.2.9
Status affected
Version 7.0.7
Status affected
Version 7.7.0
Status affected
Version 7.4.2.2
Status affected
Version 7.2.10
Status affected
Version 7.6.1
Status affected
Version 7.4.2.3
Status affected
Version 7.0.8
Status affected
Version 7.6.2
Status affected
Version 7.7.10
Status affected
Version 7.7.11
Status affected
Version 7.0.8.1
Status affected
Version 7.6.2.1
Status affected
Version 7.7.10.1
Status affected
Version 7.4.2.4
Status affected
Version 7.2.10.2
Status affected
Version 7.4.3
Status affected
Version 7.6.4
Status affected
Version 7.4.4
Status affected
Version 7.0.9
Status affected
Version 7.2.11
Status affected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.46% 0.389
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Cisco PSIRT 8.6 3.9 4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls1.3-dos-dLxwFWgF