CVE-2026-73215

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (37th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 11, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 11, 2026
Patch available. Sources: github_commit, github_release, github.
githubMentions a patch (unverified)

The coturn server can end in a state where it does not accept more requests with "even-port" enabled. · Advisory · coturn/coturn · GitHub

https://github.com/coturn/coturn/security/advisories/GHSA-847g-qmc6-6m4r
github_release Patch Available

4.17.0

Patch available: coturn/coturn 4.17.0

https://github.com/coturn/coturn/releases/tag/4.17.0
github_commit Patch Available

commit 4adbd82e7845 (coturn/coturn)

Patch available: coturn/coturn 4.17.0 (contains commit 4adbd82e7845)

https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-1, 4.6.1-2
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-2
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 46× 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 108 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-73215?
CVE-2026-73215 is a high vulnerability published on August 11, 2026. Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnportsallocateeven() in src/apps/relay/turnports.c marks the unused odd sibling port as TPSTAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it,…
When was CVE-2026-73215 disclosed?
CVE-2026-73215 was first published on August 11, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73215 actively exploited?
CVE-2026-73215 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73215?
CVE-2026-73215 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73215?
A fix for CVE-2026-73215 is available: update to the fixed version the vendor names in its advisory.

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