- Critical 9.5
- Known exploited (CISA KEV)
CVE-2026-72530
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 use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.
Scores
The facts
- Published
- 19 August 2026
- Last changed
- 21 August 2026
- NVD status
- Analyzed
- Severity
- Critical, CVSS 9.5 out of 10 (version 4.0)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R… - Weakness
- Affects
- trueconf trueconf server
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 20 August 2026.
- EPSS
- 1.7% chance of exploitation activity in the next 30 days (percentile 77).
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