CVE-2026-6682

HIGHPre-NVD 7.67.6—
EchelonGraph scoreHIGH confidence

Score 7.6 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. a secondary CVSS source baseline 7.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mount_volume() where fasize *= fs->n_fats can wrap, leading to attacker-controlled file-size metadata and unsafe read lengths in downstream callers. This maps to CWE-190 (Integer Overflow or Wraparound). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (7.6, High). Remote delivery is also possible in OTA/update pipelines. The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Total.

CVSS v3
7.6
EG Score
7.6(high)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity76% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 2, 2026

Advisory Details (3)

Auto-updated Jul 2, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

GitHub - runZeroInc/vulns-2026-fatfs-chance · GitHub

https://github.com/runZeroInc/vulns-2026-fatfs-chance
generic🔴 Active Exploitation

Seven FatFs bugs, one very large blast radius

https://www.runzero.com/blog/fatfs-bugs/
generic🔴 Active Exploitation

FatFS FAT32 integer overflow in mount_volume()

https://www.runzero.com/advisories/fatfs-fat32-int-of-mnt-cve-2026-6682/

Vendor Advisories for CVE-2026-6682(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 21× in last 7d / 80× 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. 2026-07-29 06:22 UTCGHSA enrichment
  2. 2026-07-28 17:47 UTCEG score recompute
  3. 2026-07-28 17:47 UTCGHSA enrichment
  4. 2026-07-28 15:37 UTCEPSS rescore
  5. 2026-07-28 04:32 UTCGHSA enrichment
  6. 2026-07-27 16:00 UTCEG score recompute
  7. 2026-07-27 16:00 UTCGHSA enrichment
  8. 2026-07-27 14:14 UTCEPSS rescore
  9. 2026-07-27 01:50 UTCEG score recompute
  10. 2026-07-27 01:50 UTCGHSA enrichment
  11. 2026-07-26 14:54 UTCEPSS rescore
  12. 2026-07-26 13:19 UTCEG score recompute
  13. 2026-07-26 13:19 UTCGHSA enrichment
  14. 2026-07-25 14:18 UTCEPSS rescore
  15. 2026-07-24 14:18 UTCEPSS rescore
  16. 2026-07-24 14:18 UTCEPSS rescore
  17. 2026-07-23 14:18 UTCEPSS rescore
  18. 2026-07-23 14:18 UTCEPSS rescore
  19. 2026-07-23 03:22 UTCEG score recompute
  20. 2026-07-22 14:08 UTCEPSS rescore
  21. 2026-07-22 14:08 UTCEPSS rescore
  22. 2026-07-21 15:25 UTCEPSS rescore
  23. 2026-07-21 15:25 UTCEPSS rescore
  24. 2026-07-20 17:08 UTCEPSS rescore
  25. 2026-07-19 14:31 UTCEPSS rescore
Show 55 more
  1. 2026-07-19 02:29 UTCEPSS rescore
  2. 2026-07-18 10:04 UTCEPSS rescore
  3. 2026-07-16 20:07 UTCGHSA enrichment
  4. 2026-07-16 17:03 UTCEPSS rescore
  5. 2026-07-16 07:36 UTCGHSA enrichment
  6. 2026-07-15 19:04 UTCGHSA enrichment
  7. 2026-07-15 16:57 UTCEPSS rescore
  8. 2026-07-15 06:33 UTCGHSA enrichment
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-14 18:02 UTCGHSA enrichment
  11. 2026-07-14 05:11 UTCGHSA enrichment
  12. 2026-07-13 16:40 UTCGHSA enrichment
  13. 2026-07-13 06:13 UTCEPSS rescore
  14. 2026-07-13 06:13 UTCEPSS rescore
  15. 2026-07-13 04:08 UTCGHSA enrichment
  16. 2026-07-12 15:30 UTCGHSA enrichment
  17. 2026-07-12 05:46 UTCEPSS rescore
  18. 2026-07-12 02:58 UTCGHSA enrichment
  19. 2026-07-11 14:27 UTCGHSA enrichment
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-11 08:27 UTCEPSS rescore
  22. 2026-07-11 01:56 UTCGHSA enrichment
  23. 2026-07-10 13:25 UTCGHSA enrichment
  24. 2026-07-10 00:53 UTCGHSA enrichment
  25. 2026-07-09 19:10 UTCEPSS rescore
  26. 2026-07-09 19:10 UTCEPSS rescore
  27. 2026-07-09 12:21 UTCGHSA enrichment
  28. 2026-07-08 23:50 UTCGHSA enrichment
  29. 2026-07-08 15:16 UTCEPSS rescore
  30. 2026-07-08 15:16 UTCEPSS rescore
  31. 2026-07-08 11:19 UTCGHSA enrichment
  32. 2026-07-07 22:48 UTCGHSA enrichment
  33. 2026-07-07 13:46 UTCEPSS rescore
  34. 2026-07-07 13:46 UTCEPSS rescore
  35. 2026-07-07 10:17 UTCGHSA enrichment
  36. 2026-07-06 21:38 UTCGHSA enrichment
  37. 2026-07-06 16:27 UTCEPSS rescore
  38. 2026-07-06 16:27 UTCEPSS rescore
  39. 2026-07-06 09:07 UTCGHSA enrichment
  40. 2026-07-06 02:23 UTCEPSS rescore
  41. 2026-07-06 02:23 UTCEPSS rescore
  42. 2026-07-05 20:34 UTCGHSA enrichment
  43. 2026-07-05 08:03 UTCGHSA enrichment
  44. 2026-07-05 02:31 UTCEPSS rescore
  45. 2026-07-05 02:30 UTCEPSS rescore
  46. 2026-07-04 19:24 UTCGHSA enrichment
  47. 2026-07-04 06:53 UTCGHSA enrichment
  48. 2026-07-04 06:31 UTCEPSS rescore
  49. 2026-07-04 06:31 UTCEPSS rescore
  50. 2026-07-03 18:14 UTCGHSA enrichment
  51. 2026-07-03 05:42 UTCGHSA enrichment
  52. 2026-07-02 17:10 UTCGHSA enrichment
  53. 2026-07-02 04:33 UTCGHSA enrichment
  54. 2026-07-01 16:03 UTCEG score recompute
  55. 2026-07-01 16:02 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6682?
CVE-2026-6682 is a high vulnerability published on July 1, 2026. In FatFS R0.16 and earlier contains a FAT32 integer overflow bug in mountvolume() where fasize *= fs->nfats can wrap, leading to attacker-controlled file-size metadata and unsafe read lengths in downstream callers. This maps to CWE-190 (Integer Overflow or Wraparound). Estimated CVSS v3.1 vector:…
When was CVE-2026-6682 disclosed?
CVE-2026-6682 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6682 actively exploited?
CVE-2026-6682 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 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-6682?
CVE-2026-6682 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-6682?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6682, 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

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