CVE-2026-72529 TrueConf Server Missing Authentication for Critical Function

Exploited in the wild Critical 9.3 Published 19 Aug 2026 Updated 21 Aug 2026

Remote attackers can execute arbitrary scripts on TrueConf Server by calling an undocumented function without authentication.

Exploited in the wild: Since 20 Aug 2026
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-72529?

CVE-2026-72529 is a critical missing authorization vulnerability in TrueConf Server, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could execute an arbitrary script by calling an undocumented function.

Weakness: CWE-306

Which versions are affected by CVE-2026-72529?

It affects 1 product.

Products include Trueconf Trueconf Server.

How do I fix CVE-2026-72529?

No fix has been published for CVE-2026-72529 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 23 Aug 2026.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-72529 being exploited?

Yes. Attackers have exploited CVE-2026-72529 in the wild since at least 20 Aug 2026.

Sources

Also known as GHSA-xc2x-q39j-746f.