CVE-2026-77234

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (5th 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
8.8EG
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: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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-2026-77234(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 / 49× 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 19:07 UTCEG score recompute
  5. 2026-10-05 17:43 UTCEPSS rescore
  6. 2026-10-05 07:57 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 19:42 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 00:25 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 16:55 UTCEG score recompute
  24. 2026-09-24 14:04 UTCEPSS rescore
  25. 2026-09-23 18:14 UTCEG score recompute
Show 57 more
  1. 2026-09-23 17:54 UTCEPSS rescore
  2. 2026-09-22 19:43 UTCEG score recompute
  3. 2026-09-22 16:01 UTCEPSS rescore
  4. 2026-09-22 06:21 UTCEG score recompute
  5. 2026-09-21 21:09 UTCEPSS rescore
  6. 2026-09-19 22:35 UTCEG score recompute
  7. 2026-09-19 00:10 UTCEG score recompute
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 01:50 UTCEG score recompute
  10. 2026-09-16 15:48 UTCEG score recompute
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 06:15 UTCEG score recompute
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-13 20:04 UTCEG score recompute
  16. 2026-09-12 21:46 UTCEG score recompute
  17. 2026-09-12 15:02 UTCEPSS rescore
  18. 2026-09-11 23:26 UTCEG score recompute
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 12:06 UTCEG score recompute
  21. 2026-09-10 12:13 UTCEG score recompute
  22. 2026-09-10 09:35 UTCEPSS rescore
  23. 2026-09-09 01:46 UTCEG score recompute
  24. 2026-09-08 22:01 UTCEPSS rescore
  25. 2026-09-06 15:47 UTCEG score recompute
  26. 2026-09-06 13:48 UTCEPSS rescore
  27. 2026-09-04 19:03 UTCEG score recompute
  28. 2026-09-04 07:53 UTCEG score recompute
  29. 2026-09-04 05:07 UTCEPSS rescore
  30. 2026-09-02 22:22 UTCEG score recompute
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-02 00:02 UTCEG score recompute
  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-09-01 12:53 UTCEG score recompute
  35. 2026-09-01 04:40 UTCEPSS rescore
  36. 2026-09-01 04:40 UTCEPSS rescore
  37. 2026-08-31 03:07 UTCEG score recompute
  38. 2026-08-30 19:18 UTCEPSS rescore
  39. 2026-08-30 19:17 UTCEPSS rescore
  40. 2026-08-29 06:02 UTCEG score recompute
  41. 2026-08-28 21:42 UTCEPSS rescore
  42. 2026-08-28 07:31 UTCEG score recompute
  43. 2026-08-27 20:20 UTCEG score recompute
  44. 2026-08-27 14:25 UTCEPSS rescore
  45. 2026-08-26 15:14 UTCEG score recompute
  46. 2026-08-26 14:47 UTCEPSS rescore
  47. 2026-08-25 15:02 UTCEG score recompute
  48. 2026-08-25 13:49 UTCEPSS rescore
  49. 2026-08-24 15:18 UTCEG score recompute
  50. 2026-08-24 14:18 UTCEPSS rescore
  51. 2026-08-23 05:52 UTCEG score recompute
  52. 2026-08-23 00:19 UTCEPSS rescore
  53. 2026-08-21 20:23 UTCEG score recompute
  54. 2026-08-21 19:55 UTCEG score recompute
  55. 2026-08-21 18:18 UTCEG score recompute
  56. 2026-08-21 17:54 UTCEG score recompute
  57. 2026-08-21 17:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77234?
CVE-2026-77234 is a high vulnerability published on August 21, 2026. Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.
When was CVE-2026-77234 disclosed?
CVE-2026-77234 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-2026-77234 actively exploited?
CVE-2026-77234 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-2026-77234?
CVE-2026-77234 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77234?
A fix for CVE-2026-77234 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-77234 are linked in the Vendor Advisories panel on this page.

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