Cisco IOS, IOS XE, Secure Firewall Threat Defense Denial of Service Vulnerability
Summary
CERT-Bund has issued a security advisory regarding a Denial of Service vulnerability affecting Cisco IOS, Cisco IOS XE, and Cisco Secure Firewall Threat Defense. The vulnerability has a CVSS Base Score of 8.6 and can be exploited remotely.
What changed
CERT-Bund has published advisory WID-SEC-2026-0866 detailing a critical Denial of Service (DoS) vulnerability affecting Cisco IOS, Cisco IOS XE, and Cisco Secure Firewall Threat Defense. The vulnerability, with a CVSS Base Score of 8.6, allows remote, anonymous attackers to disrupt services. The advisory indicates that mitigation measures are available.
Organizations utilizing affected Cisco products should immediately review the advisory and implement available mitigation strategies to prevent potential service disruptions. While no specific compliance deadline is stated, prompt action is recommended to address the high-severity vulnerability and protect network availability. Failure to mitigate could lead to significant operational impact due to DoS attacks.
What to do next
- Review CERT-Bund advisory WID-SEC-2026-0866 for details on the Cisco IOS, IOS XE, and Secure Firewall Threat Defense vulnerability.
- Implement available mitigation measures as recommended by Cisco and CERT-Bund.
- Assess the impact of the vulnerability on your network infrastructure and services.
Archived snapshot
Mar 26, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
[WID-SEC-2026-0866] Cisco IOS, Cisco IOS XE und Cisco Secure Firewall Threat Defense: Schwachstelle ermöglicht Denial of Service CVSS Base Score 8.6 (hoch) CVSS Temporal Score 7.5 (hoch) Remoteangriff ja Datum 25.03.2026 Stand 26.03.2026 Mitigation ja
Betroffene Systeme
Betriebssystem
- Sonstiges
Produktbeschreibung
Cisco Internetwork Operating System (IOS) ist ein Betriebssystem, das für Cisco Geräte wie z. B. Router und Switches eingesetzt wird.
Cisco Secure Firewall Threat Defense ist eine Sicherheitslösung, die Funktionen wie Firewall, Intrusion Prevention und erweiterten Malware-Schutz in einer einzigen Appliance integriert.
Produkte
25.03.2026
- Cisco IOS
Cisco IOS XE
Cisco Secure Firewall Threat Defense
Angriff
Angriff
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Cisco IOS, Cisco IOS XE und Cisco Secure Firewall Threat Defense ausnutzen, um einen Denial of Service Angriff durchzuführen. CVE Informationen Versionshistorie Feedback zum Advisory geben
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Source
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Source document text, dates, docket IDs, and authority are extracted directly from CERT-Bund.
The summary, classification, recommended actions, deadlines, and penalty information are AI-generated from the original text and may contain errors. Always verify against the source document.
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