What is CVE-2026-24640?

CVE-2026-24640 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Stack-based Buffer Overflow. CVSS score: 5.9/10. Published 2026-03-10.

How severe is CVE-2026-24640?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Fortinet Fortiweb

CVE-2026-24640

A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4 all versions, FortiWeb 7.2 all versions, FortiWeb 7.0.2 through 7.0.12 may allow a rem…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (14.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C.

Affected products

Fortinet Fortiweb — versions 8.0.0, 7.6.0, 7.4.0

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-087

Frequently asked questions

What is CVE-2026-24640?: CVE-2026-24640 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Stack-based Buffer Overflow. CVSS score: 5.9/10. Published 2026-03-10.
How severe is CVE-2026-24640?: Medium severity. CVSS v3 base score is 5.9 out of 10.