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Findings

CVE-2026-72529

TrueConf Server Missing Authentication for Critical Function Vulnerability

Published Aug 19, 2026 · updated Aug 20, 2026 · TrueConf Server

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.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2026 · Catalog

    Detected

    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.

  2. Aug 20, 2026 · CISA KEV

    Known exploited

    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

  3. Aug 20, 2026 · Catalog

    Updated

    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.

  4. Aug 23, 2026 · CISA KEV

    Remediation due

    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

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 due date Aug 23, 2026

Affected

  • cpe trueconf/trueconf serverversion unspecified
  • vendor TrueConf Serverversion unspecified

Sources

  • CISA KEVCVE-2026-72529

    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.

    cisa.gov
  • CVE.orgCVE-2026-72529

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-72529

    30-day exploitation probability 1.5%

    first.org
  • NIST NVDCVE-2026-72529

    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.

    nvd.nist.gov

References