Cisco Secure FTD und ASA: Mehrere Schwachstellen
WID-SEC-2026-3422 · first 17.09.2026 · updated 17.09.2026 · CVSS 9,9
What it is about
Cisco Secure Firewall Threat Defense ist eine Sicherheitslösung, die Funktionen wie Firewall, Intrusion Prevention und erweiterten Malware-Schutz in einer einzigen Appliance integriert. Die Cisco ASA Appliance bietet Funktionen zur Sicherung von Anwendungssoftware, wie beispielsweise Firewall oder VPN. Ein Angreifer kann mehrere Schwachstellen in Cisco Secure Firewall Threat Defense und Cisco ASA (Adaptive Security Appliance) ausnutzen, um erweiterte Berechtigungen zu erlangen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, sensible Informationen offenzulegen oder Denial-of-Service-Zustände herbeizuführen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- erweiterte Berechtigungen zu erlangen
- Sicherheitsmaßnahmen zu umgehen
- Daten zu manipulieren
- sensible Informationen offenzulegen oder Denial-of-Service-Zustände herbeizuführen
Am I affected?
Affected according to the BSI:
- Cisco Secure Firewall Threat Defense
- Cisco ASA (Adaptive Security Appliance)
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Install the updates provided by the vendor; details in the sources below.
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Cisco Security Advisory cisco-sa-asaftd-dtls-dos-Kp57HkyO vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-asaftd-eigrp-dos-GOhNejSj vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-asaftd-ikev2cert-dos-uWyc2xtv vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-asa-ftd-logging-dos-ZXXNesfN vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-asaftd-tcpdns-dos-p6dUnjr5 vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-ftd-acl-bypass-8p6vFvw vom 2026-09-16 sec.cloudapps.cisco.com
- Cisco Security Advisory cisco-sa-hardening-asaftdfmc-uvpPROhN vom 2026-09-16 sec.cloudapps.cisco.com
CVE: CVE-2026-20120, CVE-2026-20121, CVE-2026-20154, CVE-2026-20222, CVE-2026-20248, CVE-2026-20249, CVE-2026-20250, CVE-2026-20329, CVE-2026-20330, CVE-2026-20331, CVE-2026-20332, CVE-2026-20333, CVE-2026-20334, CVE-2026-20335, CVE-2026-20336
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.