CVE-2026-72529

TrueConf Server authentication bypass, confirmed exploited in the wild.

TrueConf Server contains a missing authentication for critical function vulnerability which could allow a remote unauthorized attacker with network access via port 4307/TCP to execute an arbitrary script.

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1.5%chance of exploitation in the next 30 days (EPSS), 74th percentile

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

23 Augfederal remediation deadline, already passed

Passedpast the deadline: patch now

CISA's name for it	TrueConf Server Missing Authentication for Critical Function Vulnerability
Vendor and product	TrueConf · Server
Type	authentication bypass · CWE-306
Exploited	Confirmed by CISA listed 20 August 2026
Likelihood	scored lower by EPSS, but already confirmed exploited, which outranks any prediction
Deadline	23 August 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

Apply the vendor fix and restart the affected service.

Step 2

Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant.

Step 3

Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.

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-2026-72529 in short

Is CVE-2026-72529 being exploited?

Yes. CISA added CVE-2026-72529 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-2026-72529?

US federal agencies must remediate it by 23 August 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.

How likely is CVE-2026-72529 to be exploited in the next 30 days?

FIRST's Exploit Prediction Scoring System gives it 1.5%, the 74th percentile of every CVE it scores.

How do I fix CVE-2026-72529?

Apply the vendor fix and restart the affected service. Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant. Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.

Same vendor

Other TrueConf vulnerabilities being exploited

CVE	Product	Type	Listed
CVE-2026-72530	Server	remote code execution	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.