TrueConf Server Missing Authentication for Critical Function Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 20/08/2026. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| trueconf server | ≥ 5.4.0.12689, < 5.4.9.10072≥ 5.4.0.12700, < 5.4.9.10019≥ 5.5.0.13826, < 5.5.5.10010≥ 5.5.0.13828, < 5.5.5.10009< 5.3.9.10013< 5.3.9.10015 | 5.4.9.100725.4.9.100195.5.5.100105.5.5.100095.3.9.100135.3.9.10015 |
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.
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