CVE-2026-66732

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory (severity: HIGH) published 2026-08-06. A secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.9Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Sonic 3 A.I.R. before commit 2492d18 contains a missing source address validation vulnerability in ConnectionManager where established connections are resolved by a two-byte local connection handle alone without verifying that the datagram source address matches the registered remote address for the connection. An on-path attacker who can observe cleartext UDP traffic can inject arbitrary packets into any established session by forging the two-byte connection identifier, enabling session termination via TerminateConnectionPacket, arbitrary channel message forgery, and forged request responses without requiring IP address spoofing.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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 6, 2026

Last Modified

September 24, 2026

Advisory Details (2)

Auto-updated Aug 6, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Sonic 3 A.I.R. Missing Source Address Validation in ConnectionManager | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sonic-3-a-i-r-missing-source-address-validation-in-connectionmanager
github_commit

commit 2492d1882cd2 (Eukaryot/sonic3air)

Fix landed in Eukaryot/sonic3air commit 2492d1882cd2 — awaiting tagged release

https://github.com/Eukaryot/sonic3air/commit/2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f

Vendor Advisories for CVE-2026-66732(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 64× 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 136 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 05:53 UTCEG score recompute
  3. 2026-10-04 05:53 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-02 17:56 UTCEPSS rescore
  6. 2026-10-02 09:46 UTCEG score recompute
  7. 2026-10-02 09:46 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 01:48 UTCEG score recompute
  10. 2026-10-01 01:48 UTCGHSA enrichment
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-29 06:00 UTCEG score recompute
  13. 2026-09-29 06:00 UTCGHSA enrichment
  14. 2026-09-28 13:52 UTCEPSS rescore
  15. 2026-09-27 17:35 UTCEG score recompute
  16. 2026-09-27 17:35 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-24 21:25 UTCEG score recompute
  20. 2026-09-24 21:25 UTCGHSA enrichment
  21. 2026-09-24 01:56 UTCEG score recompute
  22. 2026-09-24 01:56 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 01:36 UTCEG score recompute
  25. 2026-09-23 01:36 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 01:17 UTCEG score recompute
  2. 2026-09-22 01:17 UTCGHSA enrichment
  3. 2026-09-20 20:43 UTCEG score recompute
  4. 2026-09-20 20:43 UTCGHSA enrichment
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-19 17:57 UTCEG score recompute
  7. 2026-09-19 17:57 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 17:37 UTCEG score recompute
  10. 2026-09-18 17:37 UTCGHSA enrichment
  11. 2026-09-17 15:17 UTCEG score recompute
  12. 2026-09-17 15:17 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 11:12 UTCEG score recompute
  15. 2026-09-16 11:12 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 08:18 UTCEG score recompute
  18. 2026-09-15 08:18 UTCGHSA enrichment
  19. 2026-09-14 07:58 UTCEG score recompute
  20. 2026-09-14 07:58 UTCGHSA enrichment
  21. 2026-09-13 07:38 UTCEG score recompute
  22. 2026-09-13 07:38 UTCGHSA enrichment
  23. 2026-09-12 07:18 UTCEG score recompute
  24. 2026-09-12 07:18 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
  26. 2026-09-11 09:37 UTCEPSS rescore
  27. 2026-09-11 06:58 UTCEG score recompute
  28. 2026-09-11 06:58 UTCGHSA enrichment
  29. 2026-09-10 06:38 UTCGHSA enrichment
  30. 2026-09-09 06:13 UTCEG score recompute
  31. 2026-09-09 06:13 UTCGHSA enrichment
  32. 2026-09-08 22:01 UTCEPSS rescore
  33. 2026-09-07 18:04 UTCEG score recompute
  34. 2026-09-07 18:04 UTCGHSA enrichment
  35. 2026-09-07 16:01 UTCEPSS rescore
  36. 2026-09-06 13:47 UTCEPSS rescore
  37. 2026-09-06 10:04 UTCEG score recompute
  38. 2026-09-06 10:04 UTCGHSA enrichment
  39. 2026-09-05 15:31 UTCEPSS rescore
  40. 2026-09-05 09:43 UTCEG score recompute
  41. 2026-09-05 09:43 UTCGHSA enrichment
  42. 2026-09-04 09:23 UTCGHSA enrichment
  43. 2026-09-03 06:25 UTCGHSA enrichment
  44. 2026-09-01 23:01 UTCEG score recompute
  45. 2026-09-01 23:01 UTCGHSA enrichment
  46. 2026-09-01 13:54 UTCEPSS rescore
  47. 2026-09-01 04:40 UTCEPSS rescore
  48. 2026-08-31 22:41 UTCEG score recompute
  49. 2026-08-31 22:41 UTCGHSA enrichment
  50. 2026-08-30 19:17 UTCEPSS rescore
  51. 2026-08-30 16:39 UTCEG score recompute
  52. 2026-08-30 16:39 UTCGHSA enrichment
  53. 2026-08-30 01:22 UTCEPSS rescore
  54. 2026-08-29 16:19 UTCEG score recompute
  55. 2026-08-29 16:19 UTCGHSA enrichment
  56. 2026-08-28 21:42 UTCEPSS rescore
  57. 2026-08-28 06:02 UTCEG score recompute
  58. 2026-08-28 06:01 UTCGHSA enrichment
  59. 2026-08-27 05:08 UTCEG score recompute
  60. 2026-08-27 05:08 UTCGHSA enrichment
  61. 2026-08-26 14:47 UTCEPSS rescore
  62. 2026-08-26 04:48 UTCEG score recompute
  63. 2026-08-26 04:48 UTCGHSA enrichment
  64. 2026-08-25 13:49 UTCEPSS rescore
  65. 2026-08-25 04:28 UTCEG score recompute
  66. 2026-08-25 04:28 UTCGHSA enrichment
  67. 2026-08-24 04:09 UTCGHSA enrichment
  68. 2026-08-23 03:49 UTCGHSA enrichment
  69. 2026-08-22 03:30 UTCEG score recompute
  70. 2026-08-22 03:30 UTCGHSA enrichment
  71. 2026-08-21 23:49 UTCEPSS rescore
  72. 2026-08-21 03:09 UTCEG score recompute
  73. 2026-08-21 03:09 UTCGHSA enrichment
  74. 2026-08-20 22:56 UTCEPSS rescore
  75. 2026-08-20 02:49 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-66732?
CVE-2026-66732 is a medium vulnerability published on August 6, 2026. Sonic 3 A.I.R. before commit 2492d18 contains a missing source address validation vulnerability in ConnectionManager where established connections are resolved by a two-byte local connection handle alone without verifying that the datagram source address matches the registered remote address for…
When was CVE-2026-66732 disclosed?
CVE-2026-66732 was first published on August 6, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66732 actively exploited?
CVE-2026-66732 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-66732?
CVE-2026-66732 has a CVSS base score of 5.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-66732?
An upstream fix for CVE-2026-66732 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-66732 are linked in the Vendor Advisories panel on this page.

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