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.
Published: 2026-08-28
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial‑of‑Service via UPnP daemon crash
Action: Apply Patch
AI Analysis

Impact

A NULL pointer dereference is triggered when the router processes a specially crafted SOAP action request in the UPnP service. The firmware bug causes the UPnP daemon to terminate unexpectedly, resulting in a denial‑of‑service condition that persists until the service is manually restarted or the device is rebooted.

Affected Systems

Only the TP‑Link TL‑WR841N series running firmware version 14 is affected. The vulnerability lies in the UPnP component of this router.

Risk and Exploitability

The CVSS score of 5.3 indicates a moderate impact. EPSS data is not available, so precise exploit likelihood cannot be quantified; however based on the description it is inferred that the vulnerability is pre‑authentication and can be triggered by any network host that can send a malicious SOAP request, so careful observation of network traffic is prudent. The flaw is not listed in the CISA KEV catalog, meaning no publicly confirmed exploits are known at this time.

Generated by OpenCVE AI on August 29, 2026 at 00:23 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest firmware release from TP‑Link for the TL‑WR841N v14 router, which contains a fix for the UPnP SOAP null pointer dereference.
  • If a firmware upgrade is not immediately possible, disable the UPnP service via the router’s settings or block UPnP traffic on the network firewall to prevent remote SOAP requests.
  • Verify that the UPnP daemon remains stable after a reboot and monitor system logs for unexpected crashes; if crashes persist, consider resetting the device or performing a hardware reset to clear transient faults.

Generated by OpenCVE AI on August 29, 2026 at 00:23 UTC.

Tracking

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Advisories

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History

Tue, 01 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Tp-link
Tp-link tl-wr841n V14
Vendors & Products Tp-link
Tp-link tl-wr841n V14

Mon, 31 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Fri, 28 Aug 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title Pre-Authentication NULL Pointer Dereference in UPnP SOAP Action Request Processing in TP-Link TL-WR841N
Weaknesses CWE-476
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Subscriptions

Tp-link Tl-wr841n V14
cve-icon MITRE

Status: PUBLISHED

Assigner: TPLink

Published:

Updated: 2026-08-31T18:37:30.759Z

Reserved: 2026-08-19T15:49:30.548Z

Link: CVE-2026-76649

cve-icon Vulnrichment

Updated: 2026-08-31T18:37:26.829Z

cve-icon NVD

Status : Deferred

Published: 2026-08-28T22:16:53.250

Modified: 2026-09-01T20:50:58.753

Link: CVE-2026-76649

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-01T14:17:04Z

Weaknesses