TrueConf Server's Missing Authentication on a Critical Function Allows Unauthenticated Remote Attackers to Access Administrative Capabilities; CISA's August 23rd KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-72529

Key Details

CVE	CVE-2026-72529
Vulnerability Name	TrueConf Server Missing Authentication for Critical Function Vulnerability
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-09-20
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	TrueConf Server and TrueConf TrueConf Server
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-306 (Missing Authentication for Critical Function)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-08-20.
Exploitation prediction (EPSS)	1.46% probability of exploitation in the next 30 days (73% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-08-23 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
TrueConf	Server
TrueConf	TrueConf Server

Vendor

Product

Affected Versions

Patch Status

TrueConf

Server

TrueConf

TrueConf Server

Subsystems	General OT
Sectors	Multiple

What to Know

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.

What to Do

Monitor TrueConf's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72529
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72529

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-72529

CVE

https://www.cve.org/CVERecord?id=CVE-2026-72529

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-08-20
Required Action Due Date	2026-08-23
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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-08-20

Required Action Due Date

2026-08-23

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.