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Medium4.0Fortinet

Medium [CVE-2026-25690] Arbitrary log file read in administrative interface

This medium-severity Fortinet advisory covers CVE-2026-25690.

FG-IR-26-138 Published May 12, 2026Updated by vendor May 12, 2026
Affected products & platforms
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Summary

CVSSv3 Score:

4.0

An Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') vulnerability [CWE-88] in FortiDeceptor WEB UI may allow an authenticated attacker with at least read-only admin permission to read log files via HTTP crafted requests.

Revised on 2026-05-12 00:00:00

Affected versions
  • FortiDeceptor 6.0: 6.0.0 through 6.0.2
  • FortiDeceptor 5.3: 5.3.0 through 5.3.3
  • FortiDeceptor 5.2: 5.2.0 through 5.2.1
  • FortiDeceptor 5.1: 5.1 all versions
  • FortiDeceptor 5.0: 5.0 all versions

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • FortiDeceptor 6.0: migrate to a fixed release
  • FortiDeceptor 5.3: migrate to a fixed release
  • FortiDeceptor 5.2: migrate to a fixed release
  • FortiDeceptor 5.1: migrate to a fixed release
  • FortiDeceptor 5.0: migrate to a fixed release

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade per the Affected/Solution table: FortiDeceptor 6.0: migrate to a fixed release; FortiDeceptor 5.3: migrate to a fixed release; FortiDeceptor 5.2: migrate to a fixed release; FortiDeceptor 5.1: migrate to a fixed release; FortiDeceptor 5.0: migrate to a fixed release.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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