CVE-2026-6683

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 22.6% of scored records. A rank, not a probability.

NVD base score

4.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-07-02.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-01 13:41Z2 MO AGO

Last updated

2026-07-01 15:24Z2 MO AGO

Reserved

2026-04-20

Assigning CNA

runZero

Record state

PUBLISHED

Severity

Medium (CVSS 4.6)

CNA CVSS vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-369Divide By ZeroBase

Data version

5.2

Document digest

f842133be89f4d5602df80af81f74aa01954d78e08911b7d145a3a0b874a0933

• www.runzero.comhttps://www.runzero.com/blog/fatfs-bugs/third-party-advisory
• github.comhttps://github.com/runZeroInc/vulns-2026-fatfs-chancetechnical-description
• elm-chan.orghttps://elm-chan.org/fsw/ff/product
• www.runzero.comhttps://www.runzero.com/advisories/fatfs-exfat-divide-by-zero-cve-2026-6683third-party-advisory