CVE-2026-3870: 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…

PriorityP429medium6.5CVSS 3.1

AVAACLPRNUINSUCNINAH

EPSS

0.17%

6.4th percentile

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.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
zyxel	vmg4005-b50b_firmware	<= 5.13(ABRL.5.4)C0	—

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