CVE-2026-72530

TrueConf Server remote code execution, confirmed exploited in the wild.

TrueConf Server contains a code injection vulnerability that could allow an unauthorized remote attacker with network access via port 4307/TCP to use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.

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1.7%chance of exploitation in the next 30 days (EPSS), 77th percentile

20 Augadded to CISA's Known Exploited Vulnerabilities list, 2026

3 Sepfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	TrueConf Server Code Injection Vulnerability
Vendor and product	TrueConf · Server
Type	remote code execution · CWE-94
Exploited	Confirmed by CISA listed 20 August 2026
Likelihood	more likely to be exploited than most
Deadline	3 September 2026 · already passed
Used in ransomware	Not reported
Advisories	trueconf.com ↗ · ics-cert.kaspersky.com ↗ · www.cisa.gov ↗ · www.cisa.gov ↗

What to do

Three steps, in this order

Step 1

Patch to the fixed version the vendor names, today if the product faces the internet.

Step 2

Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list.

Step 3

Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

CISA's 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.

CISA's 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.

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Questions

CVE-2026-72530 in short

Is CVE-2026-72530 being exploited?

Yes. CISA added CVE-2026-72530 to its Known Exploited Vulnerabilities catalogue on 20 August 2026, which it does only on evidence of exploitation in the wild.

What is the CISA deadline for CVE-2026-72530?

US federal agencies must remediate it by 3 September 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-72530 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 1.7%, the 77th percentile of every CVE it scores.

How do I fix CVE-2026-72530?

Patch to the fixed version the vendor names, today if the product faces the internet. Until it is patched, take the affected service off the internet or put it behind a VPN or allow-list. Look for signs it was already used: new accounts, web shells, unexpected processes and outbound connections since the date it was listed.

Same vendor

Other TrueConf vulnerabilities being exploited

CVE	Product	Type	Listed
CVE-2026-72529	Server	authentication bypass	20 August 2026
CVE-2026-3502	Client	remote code execution	2 April 2026

Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.