CVE coverage

CVE-2026-7273

CVSS 8.8 Actively exploited (KEV) no coverage

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Detection rules

No detection found — yet

None of Sigma, Elastic, Splunk ESCU, YARA, Microsoft Sentinel, Snort, or Suricata currently has a rule referencing CVE-2026-7273.

This CVE is on CISA's Known Exploited Vulnerabilities list. It is being exploited in the wild with no public detection rule — worth writing one.