CVE-2026-6682
7.6 · HIGHOverview
CVE-2026-6682 is a high-severity vulnerability affecting elm-chan fatfs. It was published on July 1, 2026 and has a CVSS 3.1 base score of 7.6 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from elm-chan. Update fatfs to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| elm-chan | fatfs | 0 | Affected |
Frequently Asked Questions
What is CVE-2026-6682?
CVE-2026-6682 is a high-severity vulnerability affecting elm-chan fatfs. It was published on July 1, 2026 and has a CVSS 3.1 base score of 7.6 (HIGH).
How severe is CVE-2026-6682?
This vulnerability has a CVSS 3.1 base score of 7.6, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-6682?
Check the references section for vendor advisories and patches from elm-chan. Update fatfs to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-6682?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-6682 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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