gs1900-16 firmware vulnerabilities and fixes

Recent CVEs affecting gs1900-16 firmware, with upgrade or downgrade steps. 1 tracked.

Also searched as: gs1900 16 firmware, gs1900-16firmware.

gs1900-16 firmware has 1 tracked vulnerability, 0 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 1. Most recent: 2026-06-16. Highest priority: CVE-2026-7273 (score 82/100).

• CVE-2026-7273 HIGH 8.8 EXPLOITED MITIGATE MITIGATE Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability

FAQ

How do I fix gs1900-16 firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is gs1900-16 firmware being exploited right now?

Yes: 1 gs1900-16 firmware CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Which gs1900-16 firmware CVE should I patch first?

CVE-2026-7273 currently ranks highest (82/100): Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability.

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