CVE-2026-73212

MEDIUMPre-NVD 5.85.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
5.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.8Exploit: 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 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 TCP CONNECT relay client to bypass an IPv4 denied-peer-ip range when the Coturn host has a useful translation route. This issue is fixed in version 4.13.1.

CVSS v3
5.8
EG Score
5.8MEDIUMmedium confidence
EG Risk
26
EG Risk 26/100

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 (value × EchelonGraph’s weight)
Severity58% × 45%
The EG Score, 5.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 11, 2026

Last Modified

September 9, 2026

Advisory Details (6)

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

coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE · Advisory · coturn/coturn · GitHub

https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4
GitHub release Patch Available

4.13.1

Patch available: coturn/coturn 4.13.1

https://github.com/coturn/coturn/releases/tag/4.13.1
GitHub pull request Patch Available

Deny link-local / ULA / site-local relay peers by default

Patch available: coturn/coturn 4.13.1 (PR #1947 merged 2026-06-15)

https://github.com/coturn/coturn/pull/1947
GitHub pull request Patch Available

Canonicalize all IPv4-in-IPv6 encodings before peer-IP checks

Patch available: coturn/coturn 4.13.1 (PR #1945 merged 2026-06-15)

https://github.com/coturn/coturn/pull/1945
GitHub commit Patch Available

commit d49ee56aa9fe (coturn/coturn)

Patch available: coturn/coturn 4.13.1 (contains commit d49ee56aa9fe)

https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc
GitHub commit Patch Available

commit cf4b4952de48 (coturn/coturn)

Patch available: coturn/coturn 4.13.1 (contains commit cf4b4952de48)

https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
coturn4.12.0-1 ... 4.6.1-2 (6 versions)
  • 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, 4.18.0-1, 4.6.1-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
coturn4.12.0-1, 4.6.1-2
  • every version up to 4.14.0-1: fixed in 4.14.0-1
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 105 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 9 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-12 15:41 UTCEG score recompute
  4. 2026-10-11 19:26 UTCEG score recompute
  5. 2026-10-11 16:42 UTCEG score recompute
  6. 2026-10-11 14:02 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-06 17:39 UTCEG score recompute
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-03 20:31 UTCEG score recompute
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-02 08:29 UTCEG score recompute
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-09-30 22:04 UTCEG score recompute
  21. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-09-29 08:20 UTCEG score recompute
  23. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  24. 2026-09-28 09:03 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
Show 71 more
  1. 2026-09-27 10:02 UTCEG score recompute
  2. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-09-25 03:46 UTCEG score recompute
  4. 2026-09-23 20:57 UTCEG score recompute
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  6. 2026-09-22 21:10 UTCEG score recompute
  7. 2026-09-21 21:13 UTCEG score recompute
  8. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-09-20 22:13 UTCEG score recompute
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  11. 2026-09-19 23:12 UTCEG score recompute
  12. 2026-09-18 23:39 UTCEG score recompute
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  14. 2026-09-18 00:36 UTCEG score recompute
  15. 2026-09-17 00:27 UTCEG score recompute
  16. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-09-15 15:49 UTCEG score recompute
  19. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-09-13 17:30 UTCEG score recompute
  21. 2026-09-12 18:30 UTCEG score recompute
  22. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-11 19:30 UTCEG score recompute
  24. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-09-10 20:29 UTCEG score recompute
  26. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  27. 2026-09-09 06:12 UTCEG score recompute
  28. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  29. 2026-09-08 07:11 UTCEG score recompute
  30. 2026-09-07 06:03 UTCEG score recompute
  31. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  32. 2026-09-06 06:21 UTCEG score recompute
  33. 2026-09-05 07:06 UTCEG score recompute
  34. 2026-09-04 08:06 UTCEG score recompute
  35. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-09-03 05:55 UTCEG score recompute
  37. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  38. 2026-09-02 06:20 UTCEG score recompute
  39. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  40. 2026-09-01 06:35 UTCEG score recompute
  41. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  42. 2026-08-31 07:34 UTCEG score recompute
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  44. 2026-08-30 08:09 UTCEG score recompute
  45. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  46. 2026-08-29 09:08 UTCEG score recompute
  47. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  48. 2026-08-28 01:39 UTCEG score recompute
  49. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  50. 2026-08-27 02:39 UTCEG score recompute
  51. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  52. 2026-08-26 03:39 UTCEG score recompute
  53. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  54. 2026-08-25 04:40 UTCEG score recompute
  55. 2026-08-23 06:40 UTCEG score recompute
  56. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  57. 2026-08-22 07:41 UTCEG score recompute
  58. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  59. 2026-08-21 08:41 UTCEG score recompute
  60. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  61. 2026-08-20 09:41 UTCEG score recompute
  62. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  63. 2026-08-19 10:42 UTCEG score recompute
  64. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  65. 2026-08-18 11:38 UTCEG score recompute
  66. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  67. 2026-08-17 12:39 UTCEG score recompute
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  69. 2026-08-16 13:39 UTCEG score recompute
  70. 2026-08-16 02:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  71. 2026-08-15 14:39 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73212?
CVE-2026-73212 is a medium-severity vulnerability; its CVE record was published on August 11, 2026. Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, goodpeeraddr() in src/server/nsturnserver.c uses ioaaddrinrange() in src/client/nsturn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC…
When was the CVE record for CVE-2026-73212 published?
The CVE record for CVE-2026-73212 was published on August 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-73212 actively exploited?
CVE-2026-73212 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73212?
CVE-2026-73212 has a CVSS base score of 5.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73212?
A fix for CVE-2026-73212 is available: update to the fixed version the vendor names in its advisory.

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