CVE-2026-73214

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 64% 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
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: 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 4.16.0, dtls_server_input_handler() and create_new_connected_udp_socket() in src/apps/relay/dtls_listener.c retain OpenSSL dtls1_reassemble_fragment() state for a 35-byte fragmented ClientHello declaring a 650,000-byte handshake before cookie validation, allowing an unauthenticated remote sender using fresh UDP tuples to exhaust memory without TURN credentials, a completed handshake, a valid cookie, or source spoofing. This issue is fixed in version 4.16.0.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 11, 2026

Last Modified

September 9, 2026

Advisory Details (6)

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

4.16.0

Patch available: coturn/coturn 4.16.0

https://github.com/coturn/coturn/releases/tag/4.16.0
github_commit Patch Available

commit beb4de9dcb6a (coturn/coturn)

Patch available: coturn/coturn docker/4.16.0-r0 (contains commit beb4de9dcb6a)

https://github.com/coturn/coturn/commit/beb4de9dcb6a475129595b943c9a34264420df09
github_commit Patch Available

commit 37e13d1d60af (coturn/coturn)

Patch available: coturn/coturn docker/4.16.0-r0 (contains commit 37e13d1d60af)

https://github.com/coturn/coturn/commit/37e13d1d60af8f1422c01b5e9f1c6bc355d03b85
github_pr Patch Available

DTLS: cap concurrent half-open handshakes (pre-cookie state-exhaustion)

Patch available: coturn/coturn docker/4.16.0-r0 (PR #2012 merged 2026-07-26)

https://github.com/coturn/coturn/pull/2012
github_pr Patch Available

DTLS listener: correct the handshake buffer bound and remove the non-functional client-cert path

Patch available: coturn/coturn docker/4.16.0-r0 (PR #2003 merged 2026-07-26)

https://github.com/coturn/coturn/pull/2003
github Patch Available

coturn allocates a full per-peer SSL/session before verifying the DTLS cookie, enabling source-spoofing/botnet state-exhaustion DoS · Advisory · coturn/coturn · GitHub

https://github.com/coturn/coturn/security/advisories/GHSA-5x2p-4vqj-f6m4

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-1, 4.6.1-2——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
coturn4.12.0-1, 4.14.0-1, 4.15.0-1, 4.6.1-2——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 51× 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. 2026-09-19 17:02 UTCEG score recompute
  2. 2026-09-19 02:51 UTCEG score recompute
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 02:08 UTCEG score recompute
  5. 2026-09-17 00:27 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 04:26 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-14 03:38 UTCEG score recompute
  11. 2026-09-13 02:59 UTCEG score recompute
  12. 2026-09-12 15:02 UTCEPSS rescore
  13. 2026-09-12 02:19 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 13:59 UTCEG score recompute
  16. 2026-09-10 09:49 UTCEG score recompute
  17. 2026-09-10 09:35 UTCEPSS rescore
  18. 2026-09-09 05:35 UTCEG score recompute
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 18:24 UTCEG score recompute
  21. 2026-09-06 15:27 UTCEG score recompute
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 02:45 UTCEG score recompute
  24. 2026-09-05 01:07 UTCEG score recompute
  25. 2026-09-04 08:06 UTCEG score recompute
Show 51 more
  1. 2026-09-04 05:07 UTCEPSS rescore
  2. 2026-09-02 23:57 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-02 01:53 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 13:18 UTCEG score recompute
  7. 2026-09-01 04:40 UTCEPSS rescore
  8. 2026-09-01 04:40 UTCEPSS rescore
  9. 2026-08-30 22:15 UTCEG score recompute
  10. 2026-08-30 19:18 UTCEPSS rescore
  11. 2026-08-30 19:17 UTCEPSS rescore
  12. 2026-08-30 09:55 UTCEG score recompute
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-29 09:08 UTCEG score recompute
  15. 2026-08-28 21:42 UTCEPSS rescore
  16. 2026-08-27 21:33 UTCEG score recompute
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 20:54 UTCEG score recompute
  19. 2026-08-26 14:47 UTCEPSS rescore
  20. 2026-08-25 20:08 UTCEG score recompute
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-24 19:28 UTCEG score recompute
  23. 2026-08-23 06:27 UTCEG score recompute
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 05:47 UTCEG score recompute
  26. 2026-08-21 23:49 UTCEPSS rescore
  27. 2026-08-21 05:08 UTCEG score recompute
  28. 2026-08-20 22:56 UTCEPSS rescore
  29. 2026-08-20 04:17 UTCEG score recompute
  30. 2026-08-19 17:04 UTCEPSS rescore
  31. 2026-08-18 15:16 UTCEG score recompute
  32. 2026-08-18 13:49 UTCEPSS rescore
  33. 2026-08-18 13:49 UTCEPSS rescore
  34. 2026-08-17 14:18 UTCEG score recompute
  35. 2026-08-17 13:47 UTCEPSS rescore
  36. 2026-08-17 01:59 UTCEG score recompute
  37. 2026-08-16 14:56 UTCEPSS rescore
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 13:39 UTCEG score recompute
  40. 2026-08-16 02:15 UTCEPSS rescore
  41. 2026-08-15 13:00 UTCEG score recompute
  42. 2026-08-15 01:31 UTCEPSS rescore
  43. 2026-08-14 00:01 UTCEG score recompute
  44. 2026-08-13 22:00 UTCEPSS rescore
  45. 2026-08-12 23:22 UTCEG score recompute
  46. 2026-08-12 22:21 UTCEG score recompute
  47. 2026-08-12 19:15 UTCEG score recompute
  48. 2026-08-12 13:51 UTCEPSS rescore
  49. 2026-08-11 18:37 UTCEG score recompute
  50. 2026-08-11 18:05 UTCEG score recompute
  51. 2026-08-11 18:00 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73214?
CVE-2026-73214 is a high vulnerability published on August 11, 2026. Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, dtlsserverinputhandler() and createnewconnectedudpsocket() in src/apps/relay/dtlslistener.c retain OpenSSL dtls1reassemblefragment() state for a 35-byte fragmented ClientHello declaring a 650,000-byte handshake…
When was CVE-2026-73214 disclosed?
CVE-2026-73214 was first published in the National Vulnerability Database 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-2026-73214 actively exploited?
CVE-2026-73214 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 63.8% of all scored CVEs.
What is the CVSS score of CVE-2026-73214?
CVE-2026-73214 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-73214?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73214, 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.

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