CVE-2026-51640 Missing authorization in n/a
Unauthenticated attackers can access mesh neighbor information via a crafted POST request due to incorrect access control in the TOTOLINK T6 router.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-51640?
CVE-2026-51640 is a medium-severity missing authorization vulnerability in n/a, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Incorrect access control in the getMeshNeighborTable function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain mesh neighbor information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Weakness: CWE-284
Which versions are affected by CVE-2026-51640?
How do I fix CVE-2026-51640?
No fix has been published for CVE-2026-51640 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-51640 being exploited?
There is no known exploitation of CVE-2026-51640 in the wild and no public exploit code.
Sources
Also known as GHSA-wmfp-mp4j-23gh.