CVE-2026-72529
TrueConf — TrueConf Server Missing Authentication for Critical Function Vulnerability
TrueConf · CWE-306 · in CISA KEV since 2026-08-20
EVRS 75 of 100 Urgent
Patch This Cycle
Rank 1,267 of 2,960 tracked
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.015.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyApplied
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- trueconf.com/…/security-fixes-updates-and-advisories
- ics-cert.kaspersky.com/…/trueconf-server-missing-authentication-for-critical-function
- BOD 26-04
- Forensics Triage Requirements
- nvd.nist.gov/…/CVE-2026-72529
Fixed in
trueconf server: update to 5.3.9.10013 or later | trueconf server: update to 5.3.9.10015 or later | trueconf server: update to 5.4.9.10072 or later | trueconf server: update to 5.4.9.10019 or later | trueconf server: update to 5.5.5.10010 or later | trueconf server: update to 5.5.5.10009 or later
Affected versions
- trueconf server
< 5.3.9.10013< 5.3.9.10015>= 5.4.0.12689 < 5.4.9.10072>= 5.4.0.12700 < 5.4.9.10019>= 5.5.0.13826 < 5.5.5.10010>= 5.5.0.13828 < 5.5.5.10009
Remediation
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.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 9.3 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.015 (73.4th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2026-08-23 · CISA federal deadline · Overdue by 2 months | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 9.3 (v4.0), assigned by Kaspersky. | Listed | ENISA EUVD |
Description
NVDA 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 CISA says to do