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 65% 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
35%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 12, 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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 39× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 09:08 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 21:33 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 20:54 UTCEG score recompute
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-25 20:08 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 19:28 UTCEG score recompute
  11. 2026-08-23 06:27 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 05:47 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 05:08 UTCEG score recompute
  16. 2026-08-20 22:56 UTCEPSS rescore
  17. 2026-08-20 04:17 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-18 15:16 UTCEG score recompute
  20. 2026-08-18 13:49 UTCEPSS rescore
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-17 14:18 UTCEG score recompute
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-17 01:59 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 14 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 13:39 UTCEG score recompute
  3. 2026-08-16 02:15 UTCEPSS rescore
  4. 2026-08-15 13:00 UTCEG score recompute
  5. 2026-08-15 01:31 UTCEPSS rescore
  6. 2026-08-14 00:01 UTCEG score recompute
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-12 23:22 UTCEG score recompute
  9. 2026-08-12 22:21 UTCEG score recompute
  10. 2026-08-12 19:15 UTCEG score recompute
  11. 2026-08-12 13:51 UTCEPSS rescore
  12. 2026-08-11 18:37 UTCEG score recompute
  13. 2026-08-11 18:05 UTCEG score recompute
  14. 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 August 12, 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 64.8% 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73214

Explore →

Is Your Infrastructure Affected by CVE-2026-73214?

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

Start Free Scan →Browse All CVEs