What is GHSA-r75m-m2v9-89vv?

GHSA-r75m-m2v9-89vv is a security advisory published by GitHub Security Advisories with Medium severity. A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B...

Which CVE IDs does GHSA-r75m-m2v9-89vv cover?

GHSA-r75m-m2v9-89vv covers the following CVE IDs: CVE-2026-3870. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-r75m-m2v9-89vv?

GHSA-r75m-m2v9-89vv has a CVSS v3 base score of 6.5, published by GitHub Security Advisories.

GHSA-r75m-m2v9-89vvMediumCVSS 6.5

A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B...

Vendor

GitHub Security Advisories

Published

June 2, 2026

Last Modified

June 2, 2026

🔗 CVE IDs covered (1)

CVE-2026-3870 →

📋 Description

A buffer overflow vulnerability in the UPnP AddPortMapping() command in Zyxel VMG4005-B50B firmware versions through 5.13(ABRL.5.4)C0 could allow an adjacent attacker to trigger a temporary denial-of-service (DoS) condition affecting the UPnP function of the affected device.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-3870
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerabilities-in-the-upnp-function-of-certain-4g-lte-5g-nr-cpe-and-dsl-ethernet-cpe-06-02-2026
https://github.com/advisories/GHSA-r75m-m2v9-89vv