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 — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 1.7%CVSS: 9.0Exploit: cisa kev · ssvc activeExposed services: Not assessed

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

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
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

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%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.
EPSS PROB
1.7%
EPSS %ILE
76th
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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 57× in last 7d / 250× 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.

Showing the most recent 100 of 410 total refreshes for this CVE.

  1. 2026-10-05 11:59 UTCGHSA enrichment
  2. 2026-10-05 08:13 UTCGHSA enrichment
  3. 2026-10-05 04:26 UTCGHSA enrichment
  4. 2026-10-05 00:38 UTCEG score recompute
  5. 2026-10-05 00:38 UTCGHSA enrichment
  6. 2026-10-04 23:22 UTCEPSS rescore
  7. 2026-10-04 20:52 UTCGHSA enrichment
  8. 2026-10-04 17:04 UTCGHSA enrichment
  9. 2026-10-04 13:15 UTCGHSA enrichment
  10. 2026-10-04 09:27 UTCGHSA enrichment
  11. 2026-10-04 05:41 UTCGHSA enrichment
  12. 2026-10-04 01:54 UTCGHSA enrichment
  13. 2026-10-03 22:08 UTCGHSA enrichment
  14. 2026-10-03 18:20 UTCGHSA enrichment
  15. 2026-10-03 14:32 UTCEG score recompute
  16. 2026-10-03 14:32 UTCGHSA enrichment
  17. 2026-10-03 14:26 UTCEPSS rescore
  18. 2026-10-03 10:45 UTCGHSA enrichment
  19. 2026-10-03 06:58 UTCGHSA enrichment
  20. 2026-10-03 03:11 UTCGHSA enrichment
  21. 2026-10-02 23:24 UTCGHSA enrichment
  22. 2026-10-02 19:37 UTCEG score recompute
  23. 2026-10-02 19:37 UTCGHSA enrichment
  24. 2026-10-02 15:50 UTCGHSA enrichment
  25. 2026-10-02 12:03 UTCGHSA enrichment
Show 75 more
  1. 2026-10-02 08:15 UTCGHSA enrichment
  2. 2026-10-02 04:28 UTCGHSA enrichment
  3. 2026-10-02 00:41 UTCGHSA enrichment
  4. 2026-10-01 20:55 UTCEG score recompute
  5. 2026-10-01 20:54 UTCGHSA enrichment
  6. 2026-10-01 19:50 UTCEPSS rescore
  7. 2026-10-01 17:05 UTCGHSA enrichment
  8. 2026-10-01 13:18 UTCGHSA enrichment
  9. 2026-10-01 09:31 UTCGHSA enrichment
  10. 2026-10-01 05:44 UTCGHSA enrichment
  11. 2026-10-01 01:57 UTCGHSA enrichment
  12. 2026-09-30 22:10 UTCGHSA enrichment
  13. 2026-09-30 18:23 UTCEG score recompute
  14. 2026-09-30 18:23 UTCGHSA enrichment
  15. 2026-09-30 14:36 UTCGHSA enrichment
  16. 2026-09-30 10:50 UTCGHSA enrichment
  17. 2026-09-30 07:01 UTCGHSA enrichment
  18. 2026-09-30 03:14 UTCGHSA enrichment
  19. 2026-09-29 23:26 UTCGHSA enrichment
  20. 2026-09-29 19:36 UTCGHSA enrichment
  21. 2026-09-29 15:47 UTCEG score recompute
  22. 2026-09-29 15:47 UTCGHSA enrichment
  23. 2026-09-29 11:58 UTCGHSA enrichment
  24. 2026-09-29 08:09 UTCGHSA enrichment
  25. 2026-09-29 04:22 UTCGHSA enrichment
  26. 2026-09-29 00:35 UTCEG score recompute
  27. 2026-09-29 00:35 UTCGHSA enrichment
  28. 2026-09-28 20:49 UTCGHSA enrichment
  29. 2026-09-28 17:02 UTCEG score recompute
  30. 2026-09-28 17:02 UTCGHSA enrichment
  31. 2026-09-28 13:52 UTCEPSS rescore
  32. 2026-09-28 13:15 UTCGHSA enrichment
  33. 2026-09-28 09:28 UTCGHSA enrichment
  34. 2026-09-28 05:42 UTCGHSA enrichment
  35. 2026-09-28 01:55 UTCGHSA enrichment
  36. 2026-09-27 22:07 UTCGHSA enrichment
  37. 2026-09-27 21:51 UTCCISA KEV update
  38. 2026-09-27 18:21 UTCGHSA enrichment
  39. 2026-09-27 14:34 UTCEG score recompute
  40. 2026-09-27 14:34 UTCGHSA enrichment
  41. 2026-09-27 13:48 UTCEPSS rescore
  42. 2026-09-27 10:47 UTCGHSA enrichment
  43. 2026-09-27 07:01 UTCGHSA enrichment
  44. 2026-09-27 03:14 UTCGHSA enrichment
  45. 2026-09-26 23:26 UTCGHSA enrichment
  46. 2026-09-26 19:40 UTCEG score recompute
  47. 2026-09-26 19:39 UTCGHSA enrichment
  48. 2026-09-26 15:59 UTCEPSS rescore
  49. 2026-09-26 15:51 UTCGHSA enrichment
  50. 2026-09-26 12:02 UTCGHSA enrichment
  51. 2026-09-26 08:15 UTCGHSA enrichment
  52. 2026-09-26 04:26 UTCGHSA enrichment
  53. 2026-09-26 00:38 UTCEG score recompute
  54. 2026-09-26 00:38 UTCGHSA enrichment
  55. 2026-09-25 20:49 UTCGHSA enrichment
  56. 2026-09-25 19:35 UTCCISA KEV update
  57. 2026-09-25 17:02 UTCGHSA enrichment
  58. 2026-09-25 14:55 UTCCISA KEV update
  59. 2026-09-25 13:15 UTCGHSA enrichment
  60. 2026-09-25 09:28 UTCGHSA enrichment
  61. 2026-09-25 05:41 UTCGHSA enrichment
  62. 2026-09-25 01:55 UTCGHSA enrichment
  63. 2026-09-24 22:07 UTCGHSA enrichment
  64. 2026-09-24 19:31 UTCCISA KEV update
  65. 2026-09-24 18:20 UTCGHSA enrichment
  66. 2026-09-24 14:33 UTCEG score recompute
  67. 2026-09-24 14:33 UTCGHSA enrichment
  68. 2026-09-24 10:46 UTCGHSA enrichment
  69. 2026-09-24 06:59 UTCGHSA enrichment
  70. 2026-09-24 03:13 UTCGHSA enrichment
  71. 2026-09-23 23:26 UTCGHSA enrichment
  72. 2026-09-23 19:39 UTCEG score recompute
  73. 2026-09-23 19:39 UTCGHSA enrichment
  74. 2026-09-23 17:54 UTCEPSS rescore
  75. 2026-09-23 15:52 UTCGHSA enrichment

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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 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 attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2026-72530?
CVE-2026-72530 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
Which products are affected by CVE-2026-72530?
CVE-2026-72530 affects TrueConf Server.
How do I remediate CVE-2026-72530?
No fix for CVE-2026-72530 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-72530 are linked in the Vendor Advisories panel on this page.

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