What is CVE-2026-24640?

CVE-2026-24640 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Stack-based Buffer Overflow. CVSS score: 6.6/10. Published 2026-03-10.

How severe is CVE-2026-24640?

Medium severity. CVSS v3 base score is 6.6 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 remote authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests.

Vulnerability class: Buffer Overflow

Published 2026-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Fortinet Fortiweb — versions 8.0.0, 7.6.0, 7.4.0

Weakness classification (CWE)

References

fortiguard.fortinet.com/psirt/FG-IR-26-087 (Vendor Advisory)

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: 6.6/10. Published 2026-03-10.
How severe is CVE-2026-24640?: Medium severity. CVSS v3 base score is 6.6 out of 10.