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CVE-2026-24640A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through…

Description

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.

Timeline

  1. ID reserved

    By fortinet

  2. · 46 days later

    Published

  3. · 8 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-24640, by who scored it
Scored byCVSSScoreVector
fortinetCNA (assigner)3.1Medium5.9CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
NVDNVD · Analyzed3.1Medium6.6CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.74% · top 45% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Affected products

  • Fortinet · FortiWeb

    • affected 8.0.0 – ≤ 8.0.2
    • affected 7.6.0 – ≤ 7.6.6
    • affected 7.4.0 – ≤ 7.4.13
    • affected 7.2.0 – ≤ 7.2.13
    • affected 7.0.2 – ≤ 7.0.12

What to do

Solution: Upgrade to FortiWeb version 8.0.3 or above Upgrade to FortiWeb version 7.6.7 or above

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .