CVE-2026-76649

Pre-Authentication NULL Pointer Dereference in UPnP SOAP Action Request Processing in TP-Link TL-WR841N

MEDIUM
5.3
CVSS Score
Published: August 28, 2026 at 08:18 PM UTC
Updated: September 1, 2026 at 09:01 PM UTC
1 product affected across 1 vendorTL-WR841N

Using TL-WR841N v14 by TP-Link System Inc.?

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A NULL pointer dereference vulnerability exists in TL-WR841N v14 in the UPnP service when processing SOAP action requests. A specially crafted SOAP action request containing unexpected XML content may cause the UPnP daemon to terminate unexpectedly. Successful exploitation may result in a denial-of-service condition affecting UPnP functionality until the service is restarted or the device is rebooted.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588v < TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478
Affected range stops below TL-WR841N(EU)_V14_4.19 Build 260821 Rel.56588, so it looks safe — our inference, not a vendor statement
Affected range stops below TL-WR841N(US)_V14_4.19 Build 260820 Rel.33478, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMTPLink
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-476

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