CVE-2026-77945 TRENDnet TEW-821DAP ssi upload.cgi command injection
Remote attackers can execute arbitrary commands via the filename argument in upload.cgi, requiring authentication.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-77945?
CVE-2026-77945 is a medium-severity command injection vulnerability in TRENDnet TEW-821DAP, published on 22 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in TRENDnet TEW-821DAP 2.2.01b05. Affected is an unknown function of the file /cgi-bin/upload.cgi of the component ssi. Performing a manipulation of the argument filename results in command injection. The attack may be initiated remotely. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-77945?
How do I fix CVE-2026-77945?
No fix has been published for CVE-2026-77945 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-77945 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77945 exists.
Sources
Also known as GHSA-399f-4wg3-w73h.