CVE-2026-72529TrueConf 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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 9.3 | CRITICAL | 4.0Kaspersky (CNA) | 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 |
| 9.8 | CRITICAL | 3.1Kaspersky (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CISA required action
⚡ Known exploited · remediation due Aug 23, 2026
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.
Details
- CVE ID
- CVE-2026-72529
- Status
- Analyzed
- Assigner (CNA)
- Kaspersky
- Published
- Aug 19, 2026
- Last modified
- 2026-08-21 04:18 UTC
- Weaknesses
- CWE-306 · Missing Authentication for Critical Function
Affected Products
As published by the CNA in the CVE record.
TrueConfTrueConf Server4 version ranges
- before 5.3
- 5.3 before 5.3.9
- 5.4 before 5.4.9
- 5.5 before 5.5.5
References
- ics-cert.kaspersky.com https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-missing-authentication-for-critical-function/
- securelist.com https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72529