Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
CVE-2026-7273 Exploited
Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
Being exploited in the wild
Catalogued 21 September 2026 · US federal remediation deadline 24 September 2026
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…
Assessment
- CVSS
- Not yet scored
- Severity
- Unscored
- Known exploited
- Yes — listed in the CISA KEV catalog
- Exploit availability
- CISA KEV
- Published
- 21 September 2026
- Last updated
- 21 September 2026
- Affected
- Zyxel · GS1900 Series Switches
- Weakness
- CWE-121
At the source
References
Query this programmatically
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curl https://www.cve.zerocrew.in/api/cve/CVE-2026-7273