CVE-2026-76650
Pre-Authentication NULL Pointer Dereference in UPnP SOAP State Variable Query Processing in TP-Link TL-WR841N
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.
INFO
Published Date :
Aug. 28, 2026, 10:16 p.m.
Last Modified :
Aug. 28, 2026, 10:16 p.m.
Remotely Exploit :
No
Source :
f23511db-6c3e-4e32-a477-6aa17d310630
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | f23511db-6c3e-4e32-a477-6aa17d310630 | ||||
| CVSS 4.0 | MEDIUM | f23511db-6c3e-4e32-a477-6aa17d310630 |
Solution
- Update firmware to the latest available version.
- Disable UPnP if not strictly required.
- Restart the affected UPnP service process.
- Reboot the device.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-76650.
| URL | Resource |
|---|---|
| https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware | |
| https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware | |
| https://www.tp-link.com/us/support/faq/5270/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-76650 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-76650
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-76650 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-76650 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by f23511db-6c3e-4e32-a477-6aa17d310630
Aug. 28, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-476 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/76xxx/CVE-2026-76650.json">CVE-2026-76650</a> Added Reference https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware Added Reference https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware Added Reference https://www.tp-link.com/us/support/faq/5270/