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High · 7.1 CVE-2026-3622 EUVD-2026-16419GHSA-hhj2-6q7v-v5hc

Denial-of-Service Vulnerability in UPnP Component of TP Link's TL-WR841N

Published Mar 26, 2026 · Updated Mar 27, 2026 · Assigned by TPLink

Description

The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service.

Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition. 
This vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304).

Affected products

VendorProductAffectedFixed
TP-Link Systems TL-WR841N v14 < 0.9.1 4.19 0.9.1 4.19

References