TrueConf Server Missing Authentication for Critical Function Vulnerability
TrueConf — TrueConf Server
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.
9.3
1.6%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (Vulnerable System)
- High
- Integrity (Vulnerable System)
- High
- Availability (Vulnerable System)
- High
- Confidentiality (Subsequent System)
- None
- Integrity (Subsequent System)
- None
- Availability (Subsequent System)
- None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Published
- Aug 19, 2026
- Modified
- Aug 21, 2026
- Added to KEV
- Aug 20, 2026
- Federal patch due
- Aug 23, 2026
CISA required action
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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-72529, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-72529 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2026-72529?
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.
How severe is CVE-2026-72529?
CVE-2026-72529 has a CVSS base score of 9.3 out of 10 (CVSS 4.0).
Is CVE-2026-72529 actively exploited in the wild?
Yes. CVE-2026-72529 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Aug 20, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-72529?
1.6% - meaning FIRST.org's EPSS model estimates a 1.6% probability this vulnerability will be exploited in the wild within 30 days (73% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-72529?
CVE-2026-72529 is classified under CWE-306 (CWE-306: Missing Authentication for Critical Function).
Cross-checked against
Impactr finds and proves whether CVE-2026-72529 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.