CISA warns of active exploitation of critical flaw in Zyxel switches

CISA adds vulnerability CVE-2026-7273 (CVSS score 8.8) to its KEV catalog following active exploitation.

Published 11h3 sources✓ ConfirmedImportantupdated 1h

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The fact

This flaw in Zyxel GS1900 switches allows SYSTEM access via remote exploitation.

Administrators must apply the patch released by Zyxel immediately.

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Auto-synthesis from 3 media sources · identified on September 22, 2026