CVE-2026-9531 Totolink CA750-PoE Setting cstecgi.cgi setUpgradeUboot os command injection
Remote attackers can execute arbitrary OS commands via the FileName argument in the setUpgradeUboot function of the Totolink CA750-PoE web interface.
- 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-2026-9531?
CVE-2026-9531 is a medium-severity command injection vulnerability in Totolink CA750-PoE, published on 26 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.
Which versions are affected by CVE-2026-9531?
How do I fix CVE-2026-9531?
No fix has been published for CVE-2026-9531 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-2026-9531 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9531 exists.
Sources
Also known as GHSA-x42p-x8wg-p438.