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Advisory severityMedium6.7Fortinet

Medium [CVE-2026-40688] Out-Of-Bounds Write in administrative interface

This medium-severity Fortinet advisory covers CVE-2026-40688; related products: FortiWeb.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

FG-IR-26-127 Source published Source updated

VulniPulse record published Record updated

CVE-2026-40688
Related products & platforms
FortinetFortiWeb
Open source advisory

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Summary

CVSSv3 Score:

6.7

An out-of-bounds write vulnerability [CWE-787] in FortiWeb CGI daemon may allow a remote privileged attacker to execute arbitrary code or command via crafted HTTP requests.

Revised on 2026-04-15 00:00:00

Affected versions
  • FortiWeb 8.0: 8.0.0 through 8.0.3
  • FortiWeb 7.6: 7.6.0 through 7.6.6
  • FortiWeb 7.4: 7.4.0 through 7.4.11

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Fixed versions
  • FortiWeb 8.0: 8.0.4
  • FortiWeb 7.6: 7.6.7
  • FortiWeb 7.4: 7.4.12

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade per the Affected/Solution table: FortiWeb 8.0: 8.0.4; FortiWeb 7.6: 7.6.7; FortiWeb 7.4: 7.4.12.

Official advisory · high-confidence parse· fetched 3 months ago·verify at source

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