Exploited Zero

Darkreading •Rob Wright • January 23, 2026

Mass scanning is underway for CVE-2026-20045, which Cisco tagged as critical because successful exploitation could lead to a complete system takeover.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Exploitation of CVE-2026-20045 and Microsoft Patch Updates Cisco identified CVE-2026-20045 as a critical vulnerability, enabling complete system takeover if exploited. Mass scanning for this vulnerability began shortly after its public disclosure. Meanwhile, Microsoft addressed approximately 60 vulnerabilities in its products through its February 2026 Patch Tuesday updates. 2 sources 41

Extracted Entities

Exploited Zero

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Extracted Entities

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