What is CVE-2026-72530?
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.
Timeline
- 2026-08-19Published to the U.S. National Vulnerability Database (NVD)
- 2026-08-20Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-08-21NVD record last updated
- 2026-08-22First covered in a defend.network daily briefing
- 2026-09-03CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
TrueConf Server Code Injection Vulnerability
Affected product
TrueConf Server
Remediation Steps
- Apply the vendor security update for Trueconf Server as a priority.
- Restrict network exposure of the affected service to trusted sources until patched.
- Review logs and detections for indicators of exploitation.
- Confirm fixed versions against the official vendor advisory before deploying.
References
- https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/
- https://securelist.com/tr/head-mare-targets-trueconf-server-with-phantomcore/120988/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-72530
- https://nvd.nist.gov/vuln/detail/CVE-2026-72530
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 2 of September 2026 (September 14 – 20)
- Vulnerability Priority Report – Week 1 of September 2026 (September 7 – 13)
- Vulnerability Priority Report – Week 5 of August 2026 (August 31 – September 6)
- Vulnerability Priority Report – Week 4 of August 2026 (August 24 – 30)
- Vulnerability Priority Report – Week 3 of August 2026 (August 17 – 23)
- Android vehicles, AWS keys, Snowflake extortionist: Active threats escalate (2026-08-23)
- Trojanized npm packages, AWS credential leak, Microsoft Defender driver abuse (2026-08-22)
Browse all tracked CVEs in the defend.network CVE database →
🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.