CVE-2026-9533 Totolink CA750-PoE Setting cstecgi.cgi recvUpgradeNewFw os command injection
Remote attackers can execute arbitrary OS commands on Totolink CA750-PoE devices via the recvUpgradeNewFw function in the setting handler.
- 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-2026-9533?
CVE-2026-9533 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 vulnerability was detected in Totolink CA750-PoE 6.2c.510. The impacted element is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. Performing a manipulation of the argument fwUrl/magicid results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-9533?
How do I fix CVE-2026-9533?
No fix has been published for CVE-2026-9533 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-2026-9533 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9533 exists.
Sources
Also known as GHSA-mh4r-64r2-gj28.