Home

Description

A buffer overflow vulnerability in the UPnP DeletePortMapping() 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.

PUBLISHED Reserved 2026-03-10 | Published 2026-06-02 | Updated 2026-06-02 | Assigner Zyxel




MEDIUM: 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Product status

Default status
unaffected

<= 5.13(ABRL.5.4)C0
affected

References

www.zyxel.com/...e-5g-nr-cpe-and-dsl-ethernet-cpe-06-02-2026 vendor-advisory

cve.org (CVE-2026-3871)

nvd.nist.gov (CVE-2026-3871)

Download JSON