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: 0.3%, top 75% of all CVEs by exploit prediction. 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%CVSS: 7.1Exploit: None knownExposed: 0

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

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
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 11, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 33× 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. 2026-08-25 14:04 UTCEG score recompute
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-25 01:37 UTCEG score recompute
  4. 2026-08-24 13:12 UTCEG score recompute
  5. 2026-08-23 12:22 UTCEG score recompute
  6. 2026-08-23 00:19 UTCEPSS rescore
  7. 2026-08-22 11:32 UTCEG score recompute
  8. 2026-08-21 23:49 UTCEPSS rescore
  9. 2026-08-21 10:41 UTCEG score recompute
  10. 2026-08-20 22:56 UTCEPSS rescore
  11. 2026-08-19 21:25 UTCEG score recompute
  12. 2026-08-19 17:04 UTCEPSS rescore
  13. 2026-08-18 20:14 UTCEG score recompute
  14. 2026-08-18 13:49 UTCEPSS rescore
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-17 19:16 UTCEG score recompute
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-16 17:59 UTCEG score recompute
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 05:33 UTCEG score recompute
  22. 2026-08-16 02:15 UTCEPSS rescore
  23. 2026-08-15 04:44 UTCEG score recompute
  24. 2026-08-15 01:31 UTCEPSS rescore
  25. 2026-08-14 03:53 UTCEG score recompute
Show 8 more
  1. 2026-08-13 22:00 UTCEPSS rescore
  2. 2026-08-13 15:28 UTCEG score recompute
  3. 2026-08-13 14:25 UTCEG score recompute
  4. 2026-08-12 19:27 UTCEG score recompute
  5. 2026-08-12 13:51 UTCEPSS rescore
  6. 2026-08-11 18:37 UTCEG score recompute
  7. 2026-08-11 18:04 UTCEG score recompute
  8. 2026-08-11 18:00 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 in the National Vulnerability Database on August 11, 2026, with the most recent update on August 13, 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% probability of exploitation in the next 30 days, which ranks it in the top 74.6% of all scored CVEs.
What is the CVSS score of CVE-2026-73215?
CVE-2026-73215 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-73215?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73215, 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

Explore the affected products and dependency analysis for CVE-2026-73215

Explore →

Is Your Infrastructure Affected by CVE-2026-73215?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs