What is GHSA-rrv4-8jq5-8j78?

GHSA-rrv4-8jq5-8j78 is a security advisory published by GitHub Security Advisories with High severity. A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware...

Which CVE IDs does GHSA-rrv4-8jq5-8j78 cover?

GHSA-rrv4-8jq5-8j78 covers the following CVE IDs: CVE-2026-7273. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-rrv4-8jq5-8j78?

GHSA-rrv4-8jq5-8j78 has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-rrv4-8jq5-8j78HighCVSS 8.8

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware...

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-7273 →

📋 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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-7273
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026
https://github.com/advisories/GHSA-rrv4-8jq5-8j78