CVE-2026-72529

CVE Enrichment

CVSS: 9.3 CRITICAL
EPSS: 1.46%
EPSS Percentile: 72.94%
CISA KEV: YES — Known Exploited Vulnerability

Description

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.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: vulnerability@kaspersky.com
Published: 20-Aug-2026 00:21
Last Modified: 21-Aug-2026 11:18
EPSS Date: 2026-10-12
CWE: CWE-306

CVSS Vector


            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 /
                            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:X /
                            V:X /
                            RE:X /
                            U:X

CISA KEV Details

Date Added: 2026-08-20
Remediation Due: 2026-08-23
Known Ransomware Campaign Use: Unknown
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.
Notes: https://trueconf.com/blog/news/security-fixes-updates-and-advisories ; https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-missing-authentication-for-critical-function/ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-72529

Affected Products / Versions

trueconf / trueconf_server
Version / affected range: * · before (exclusive) 5.3.9.10013
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
trueconf / trueconf_server
Version / affected range: * · before (exclusive) 5.3.9.10015
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*
trueconf / trueconf_server
Version / affected range: * · from (inclusive) 5.4.0.12689 · before (exclusive) 5.4.9.10072
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
trueconf / trueconf_server
Version / affected range: * · from (inclusive) 5.4.0.12700 · before (exclusive) 5.4.9.10019
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*
trueconf / trueconf_server
Version / affected range: * · from (inclusive) 5.5.0.13826 · before (exclusive) 5.5.5.10010
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:windows:*:*
trueconf / trueconf_server
Version / affected range: * · from (inclusive) 5.5.0.13828 · before (exclusive) 5.5.5.10009
cpe:2.3:a:trueconf:trueconf_server:*:*:*:*:*:linux_kernel:*:*

References

Last enrichment sync: 12-Oct-2026 22:24
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-72529 Recorded Future Identifies 73 High-Impact Vulnerabilities in August, 70 Actively Exploited

CVE (71)

Malware (4)

Threat Actors (1)

Vendors (22)

Products (18)

Tools (7)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.