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.

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Fixes

Solution

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Workaround

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History

Tue, 02 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 02 Jun 2026 04:15:00 +0000

Type Values Removed Values Added
First Time appeared Zyxel
Zyxel vmg4005-b50b Firmware
Vendors & Products Zyxel
Zyxel vmg4005-b50b Firmware

Tue, 02 Jun 2026 03:45:00 +0000

Type Values Removed Values Added
Title Upnp AddPortMapping Buffer Overflow Causes Temporary Denial of Service in Zyxel VMG4005-B50B

Tue, 02 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Zyxel

Published:

Updated: 2026-06-02T13:36:20.955Z

Reserved: 2026-03-10T08:42:15.293Z

Link: CVE-2026-3870

cve-icon Vulnrichment

Updated: 2026-06-02T13:36:17.263Z

cve-icon NVD

Status : Deferred

Published: 2026-06-02T03:16:16.890

Modified: 2026-06-02T14:45:28.410

Link: CVE-2026-3870

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-02T04:00:11Z

Weaknesses