CVE-2026-3871

Published: Jun 2, 2026

Modified: Jun 2, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

Vendor	Product	Versions
Zyxel	VMG4005-B50B firmware	affected `<= 5.13(ABRL.5.4)C0`

Weaknesses (CWE)

CWE-120

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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

vendor-advisory

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CVE-2026-3871

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References