Forbes Cisco Zero-Day Vulnerability Exploited in Cyberattacks on Federal Networks
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Cisco has confirmed a critical zero-day vulnerability, rated 10/10, that allows authentication bypass. The Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning about ongoing cyberattacks exploiting this vulnerability, which primarily targets federal networks. Immediate action is required to mitigate the threat posed by these attacks.
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Updated 217d ago How this analysis works
Timeline
2026-02-26
CISA issues emergency warning about zero-day vulnerability
2026-02-28
Cisco confirms 10/10 vulnerability and ongoing attacks
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CISA Mandates Urgent Patching of Five Critical Flaws Exploited by Flax Typhoon The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch five critical vulnerabilities by October 11, 2026, following exploitation by the China-linked hacking group Flax Typhoon. The vulnerabilities, added to CISA's Known Exploited Vulnerabilities (KEV) catalog, include… 
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