CVE-2026-72529
TrueConf Server Missing Authentication for Critical Function Vulnerability
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.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Deadline for federal agencies: 2026-08-23.
6 articles across 5 outlets · first covered Aug 20, 2026 · latest Aug 21, 2026
Associated threat actors
Coverage timeline
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CISA adds TrueConf Server CVEs to KEV, urges urgent patchingsecurityaffairs.com · Aug 21, 2026
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CISA Urges Immediate Patching of Exploited TrueConf Vulnerabilitieswww.securityweek.com · Aug 21, 2026
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TrueConf Server bugs exposed as Android 17 tightens memorysecurityonline.info · Aug 21, 2026
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CVE-2026-72529 exposes TrueConf Server auth bypass on port 4307www.cisa.gov · Aug 21, 2026
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TrueConf Server bugs CVE-2026-72529/72530 let hackers run codesecurityonline.info · Aug 20, 2026
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Critical flaw in TrueConf Server lets hackers run code remotelycisa.gov · Aug 20, 2026