Vulnpedia
← All CVEs

CVE-2026-72530

CRITICAL 9.5 KNOWN EXPLOITED ALL-YEARS

Published 2026-08-19 · Last modified 2026-08-21 · Kaspersky · NVD: Analyzed

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 use a specially crafted script to break out of the isolated environment and execute arbitrary code on the host system.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-08-20. Patch or mitigate now.

Exploitation likelihood

1.7%chance of exploitation in 30 days · 77th percentile

● In CISA KEV (2026-08-20)○ Catalogued PoC◆ SSVC: exploitation active, automatable no

Impact if exploited

9.5CVSS 4.0 · CRITICAL · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup
  • ⚠Requirements: Specific conditions must be present

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Trueconf

Products Trueconf Server

Weakness (CWE)

  • CWE-94: : Code Injection

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References and research data (JSON)

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

1 candidate

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

  • VulnCheck KEV · 2026-08-12T00:00:00Z

    Source guidance: 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.

    Source ransomware assessment: Unknown

    VulnCheck KEV · CVE-2026-72530 · Updated 2026-08-12T00:00:00Z
  • VulnCheck KEV · 2026-08-12T00:00:00ZVulnCheck KEV · CVE-2026-72530
  • VulnCheck KEV · 2026-08-19T00:00:00ZVulnCheck KEV · CVE-2026-72530
  • VulnCheck KEV · 2026-08-20T00:00:00ZVulnCheck KEV · CVE-2026-72530
  • VulnCheck KEV · 2026-09-08T00:00:00ZVulnCheck KEV · CVE-2026-72530

Known Affected Software Configurations

VendorProductVersion range
TrueconfTrueconf Server< 5.3.9.10013
TrueconfTrueconf Server< 5.3.9.10015
TrueconfTrueconf Server≥ 5.4.0.12689 and < 5.4.9.10072
TrueconfTrueconf Server≥ 5.4.0.12700 and < 5.4.9.10019
TrueconfTrueconf Server≥ 5.5.0.13826 and < 5.5.5.10010
TrueconfTrueconf Server≥ 5.5.0.13828 and < 5.5.5.10009

All CVSS metrics

  • CRITICAL 9.5 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  • CRITICAL 9 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
  • CRITICAL 9.5 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • CRITICAL 9 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS