CVE-2026-72530A 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 use a specially crafted script t…
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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 Sep 3, 2026. Treat that date as your deadline.
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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 use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.
- CVSS
- 9.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Aug 20, 2026; federal remediation due Sep 3, 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)
- 1.69% (percentile 77)
- Assigned by
- Kaspersky
- NVD analysis
- Analyzed
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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-breakout-from-isolated-environment/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-2026-72530us-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.