by Kastro
Paper/Archive/CVE-2026-72530

CVE-2026-72530

TrueConf TrueConf Server — TrueConf Server Code Injection Vulnerability

KEV · due 3 SepEPSS 2%public exploitSSVC actCVSS 9.5
critical.is priorityof 100
94
CVSS 9.5 (CNA)9.5 / 10 × 3028.5In CISA KEV+3030.0EPSS percentile 77.0.770 × 2015.4Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
TrueConf Server< 5.35.3CNA
TrueConf Server5.3 – < 5.3.95.3.9CNA
TrueConf Server5.4 – < 5.4.95.4.9CNA
TrueConf Server5.5 – < 5.5.55.5.5CNA

Scores by source

Kaspersky (CNA)9.5CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Kaspersky (CNA)9.0CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: active · Automatable: no · Technical impact: total

References

writeupics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environmentrefsecurelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530kevcisa.gov/known-exploited-vulnerabilities-catalog