Critical 9.8Known exploited (CISA KEV)Published Aug 19, 2026

CVE-2026-72529A 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 c…

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects TrueConf Server and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Aug 20, 2026; federal agencies had to remediate by Aug 23, 2026. Treat that date as your deadline.

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Every CVE for TrueConf Server

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-306
Known exploited: Added to CISA KEV Aug 20, 2026; federal remediation due Aug 23, 2026Apply 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.
EPSS (exploitation in the next 30 days): 1.46% (percentile 73)
Assigned by: Kaspersky
NVD analysis: Analyzed
Record last updated: Aug 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TrueConf TrueConf Server trueconf:server (from the name)	before 5.3; from 5.3 before 5.3.9; from 5.4 before 5.4.9; from 5.5 before 5.5.5	CNA record
trueconf trueconf_server trueconf:trueconf_server	before 5.3.9.10013; before 5.3.9.10015; from 5.4.0.12689 before 5.4.9.10072; from 5.4.0.12700 before 5.4.9.10019; from 5.5.0.13826 before 5.5.5.10010; from 5.5.0.13828 before 5.5.5.10009	NVD

References

https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-missing-authentication-for-critical-function/third-party-advisory
https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/exploit, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72529us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.