CISA adds Zyxel GS1900 switch flaw CVE-2026-7273 to KEV Catalog
CISA added CVE-2026-7273, a stack-based buffer overflow in Zyxel GS1900 Series Switches, to its Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. CISA notes such flaws are frequent attack vectors and pose significant risks to the federal enterprise. BOD 26-04 requires federal agencies to prioritize rapid remediation of KEV-listed vulnerabilities.
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“CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.”
“This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.”
Summary last validated Sep 29, 2026
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