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Cisco ASA (Adaptive Security Appliance) und Secure Firewall Threat Defense: Mehrere Schwachstellen

WID-SEC-2026-0603 · first 05.03.2026 · updated 05.03.2026 · CVSS 8,6

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What it is about

Die Cisco ASA Appliance bietet Funktionen zur Sicherung von Anwendungssoftware, wie beispielsweise Firewall oder VPN. Cisco Secure Firewall Threat Defense ist eine Sicherheitslösung, die Funktionen wie Firewall, Intrusion Prevention und erweiterten Malware-Schutz in einer einzigen Appliance integriert. Ein Angreifer kann mehrere Schwachstellen in Cisco ASA (Adaptive Security Appliance) und Cisco Secure Firewall Threat Defense ausnutzen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, um beliebigen Code auszuführen, und um einen Cross-Site Scripting Angriff durchzuführen.

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

  • einen Denial of Service Angriff durchzuführen
  • Sicherheitsvorkehrungen zu umgehen
  • beliebigen Code auszuführen
  • einen Cross-Site Scripting Angriff durchzuführen

Am I affected?

Affected according to the BSI:

  • Cisco ASA (Adaptive Security Appliance)
  • Cisco Secure Firewall Threat Defense

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

CVE: CVE-2026-20008, CVE-2026-20013, CVE-2026-20014, CVE-2026-20015, CVE-2026-20020, CVE-2026-20021, CVE-2026-20022, CVE-2026-20023, CVE-2026-20024, CVE-2026-20025, CVE-2026-20039, CVE-2026-20049, CVE-2026-20069, CVE-2026-20070, CVE-2026-20073, CVE-2026-20100, CVE-2026-20101, CVE-2026-20102, CVE-2026-20103, CVE-2026-20105 …

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.

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