CVE-2026-77235

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (4th percentile of EPSS-scored CVEs). 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
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version 11.3.1 or later.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
33
EG Risk 33/100CISA 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
Severity73% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack 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). 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 21, 2026

Last Modified

August 27, 2026

Advisory Details (2)

Auto-updated Aug 21, 2026
Patch available. Sources: github_release.
generic

Issue with FreeRTOS-Kernel - CVE-2026-77234, CVE-2026-77235, CVE-2026-77236, CVE-2026-77237

https://aws.amazon.com/security/security-bulletins/2026-086-aws/
github_release Patch Available

V11.3.1

Patch available: FreeRTOS/FreeRTOS-Kernel V11.3.1

https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1

Vendor Advisories for CVE-2026-77235(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 12× in last 7d / 47× 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. 2026-10-07 23:48 UTCEPSS rescore
  2. 2026-10-06 19:21 UTCEG score recompute
  3. 2026-10-06 15:18 UTCEPSS rescore
  4. 2026-10-05 19:27 UTCEG score recompute
  5. 2026-10-05 17:43 UTCEPSS rescore
  6. 2026-10-05 08:03 UTCEG score recompute
  7. 2026-10-04 23:22 UTCEPSS rescore
  8. 2026-10-03 19:23 UTCEG score recompute
  9. 2026-10-03 14:26 UTCEPSS rescore
  10. 2026-10-02 19:53 UTCEG score recompute
  11. 2026-10-01 21:25 UTCEG score recompute
  12. 2026-10-01 19:50 UTCEPSS rescore
  13. 2026-09-30 20:28 UTCEG score recompute
  14. 2026-09-29 16:11 UTCEG score recompute
  15. 2026-09-29 15:24 UTCEPSS rescore
  16. 2026-09-29 00:32 UTCEG score recompute
  17. 2026-09-28 13:52 UTCEPSS rescore
  18. 2026-09-27 14:40 UTCEG score recompute
  19. 2026-09-27 13:48 UTCEPSS rescore
  20. 2026-09-27 02:28 UTCEG score recompute
  21. 2026-09-26 15:59 UTCEPSS rescore
  22. 2026-09-26 00:28 UTCEPSS rescore
  23. 2026-09-24 16:54 UTCEG score recompute
  24. 2026-09-24 14:04 UTCEPSS rescore
  25. 2026-09-22 19:43 UTCEG score recompute
Show 49 more
  1. 2026-09-22 16:01 UTCEPSS rescore
  2. 2026-09-22 07:26 UTCEG score recompute
  3. 2026-09-21 21:09 UTCEPSS rescore
  4. 2026-09-20 21:34 UTCEG score recompute
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-19 22:59 UTCEG score recompute
  7. 2026-09-18 01:56 UTCEG score recompute
  8. 2026-09-16 16:05 UTCEG score recompute
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 06:20 UTCEG score recompute
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-13 20:24 UTCEG score recompute
  14. 2026-09-12 21:55 UTCEG score recompute
  15. 2026-09-12 15:02 UTCEPSS rescore
  16. 2026-09-11 23:26 UTCEG score recompute
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 12:06 UTCEG score recompute
  19. 2026-09-10 12:12 UTCEG score recompute
  20. 2026-09-10 09:35 UTCEPSS rescore
  21. 2026-09-09 01:46 UTCEG score recompute
  22. 2026-09-08 22:01 UTCEPSS rescore
  23. 2026-09-06 18:03 UTCEG score recompute
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-05 19:33 UTCEG score recompute
  26. 2026-09-04 21:04 UTCEG score recompute
  27. 2026-09-01 13:56 UTCEG score recompute
  28. 2026-09-01 13:54 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-09-01 04:40 UTCEPSS rescore
  31. 2026-08-31 03:45 UTCEG score recompute
  32. 2026-08-30 19:18 UTCEPSS rescore
  33. 2026-08-30 19:17 UTCEPSS rescore
  34. 2026-08-29 06:43 UTCEG score recompute
  35. 2026-08-28 21:42 UTCEPSS rescore
  36. 2026-08-28 07:42 UTCEG score recompute
  37. 2026-08-27 20:20 UTCEG score recompute
  38. 2026-08-27 14:25 UTCEPSS rescore
  39. 2026-08-26 15:28 UTCEG score recompute
  40. 2026-08-26 14:47 UTCEPSS rescore
  41. 2026-08-24 15:50 UTCEG score recompute
  42. 2026-08-24 14:18 UTCEPSS rescore
  43. 2026-08-23 06:06 UTCEG score recompute
  44. 2026-08-23 00:19 UTCEPSS rescore
  45. 2026-08-21 20:23 UTCEG score recompute
  46. 2026-08-21 19:55 UTCEG score recompute
  47. 2026-08-21 18:18 UTCEG score recompute
  48. 2026-08-21 17:54 UTCEG score recompute
  49. 2026-08-21 17:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77235?
CVE-2026-77235 is a high vulnerability published on August 21, 2026. Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issue, users should upgrade to version…
When was CVE-2026-77235 disclosed?
CVE-2026-77235 was first published on August 21, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77235 actively exploited?
CVE-2026-77235 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77235?
CVE-2026-77235 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77235?
A fix for CVE-2026-77235 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77235 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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