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OpenAdvisories
Medium · 5.3 CVE-2026-76650 EUVD-2026-67936GHSA-wg9w-9v33-74xx

Pre-Authentication NULL Pointer Dereference in UPnP SOAP State Variable Query Processing in TP-Link TL-WR841N

Published Aug 28, 2026 · Updated Aug 31, 2026 · Assigned by TPLink

Description

A NULL
pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing
SOAP state variable query requests. A specially crafted SOAP query may trigger
unexpected termination or instability of the process hosting the UPnP service.

Successful
exploitation may result in a denial-of-service condition affecting UPnP
discovery, state query, or related management functionality until the affected
process is restarted or the device is rebooted.

Affected products

VendorProductAffectedFixed
TP-Link System TL-WR841N v14 < TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478, < TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588 TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478

References