CVE-2026-7273 — HIGH (8.8) — White Hats Nepal

Vulnerability Description

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.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-121

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advis

FAQ

What is CVE-2026-7273?

CVE-2026-7273 is a vulnerability with a CVSS score of 8.8 (HIGH). 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...

How severe is CVE-2026-7273?

CVE-2026-7273 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-7273?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.