CVE-2026-72530

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-20), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 9.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — KEV-added this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 0%CVSS: 9.0Exploit: cisa kev · ssvc activeExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.0
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
27%
KEV
⚠ Exploited

Published

August 19, 2026

Last Modified

August 21, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

KLCERT-26-058: TrueConf Server. Breakout from isolated environment | Kaspersky ICS CERT EN

https://ics-cert.kaspersky.com/advisories/2026/08/11/trueconf-server-breakout-from-isolated-environment/

Vendor Advisories for CVE-2026-72530(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 28× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 04:35 UTCEG score recompute
  2. 2026-08-21 04:35 UTCGHSA enrichment
  3. 2026-08-21 04:00 UTCEG score recompute
  4. 2026-08-21 04:00 UTCGHSA enrichment
  5. 2026-08-21 02:52 UTCGHSA enrichment
  6. 2026-08-20 23:04 UTCEG score recompute
  7. 2026-08-20 23:04 UTCGHSA enrichment
  8. 2026-08-20 22:56 UTCEPSS rescore
  9. 2026-08-20 19:18 UTCGHSA enrichment
  10. 2026-08-20 18:17 UTCEG score recompute
  11. 2026-08-20 18:17 UTCGHSA enrichment
  12. 2026-08-20 17:56 UTCEG score recompute
  13. 2026-08-20 17:56 UTCGHSA enrichment
  14. 2026-08-20 17:06 UTCCISA KEV update
  15. 2026-08-20 15:46 UTCGHSA enrichment
  16. 2026-08-20 11:58 UTCGHSA enrichment
  17. 2026-08-20 08:06 UTCGHSA enrichment
  18. 2026-08-20 04:19 UTCEG score recompute
  19. 2026-08-20 04:19 UTCGHSA enrichment
  20. 2026-08-20 04:08 UTCEG score recompute
  21. 2026-08-20 04:08 UTCGHSA enrichment
  22. 2026-08-20 02:03 UTCGHSA enrichment
  23. 2026-08-19 22:16 UTCEG score recompute
  24. 2026-08-19 22:16 UTCGHSA enrichment
  25. 2026-08-19 18:29 UTCEG score recompute
Show 3 more
  1. 2026-08-19 17:28 UTCEG score recompute
  2. 2026-08-19 17:07 UTCEG score recompute
  3. 2026-08-19 17:06 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-72530?
CVE-2026-72530 is a critical vulnerability published on August 19, 2026. 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.
When was CVE-2026-72530 disclosed?
CVE-2026-72530 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72530 actively exploited?
Yes. CISA added CVE-2026-72530 to the Known Exploited Vulnerabilities catalog on August 20, 2026, affecting TrueConf Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-72530?
CVE-2026-72530 has a CVSS v3 base score of 9.0 (NVD).
Which products are affected by CVE-2026-72530?
CVE-2026-72530 affects TrueConf Server. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-72530?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72530, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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