Arbitrary log file read in administrative interface
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
CSIRTS triage
- What
- An argument injection vulnerability allows authenticated attackers to read log files.
- Who is affected
- Authenticated users with read-only admin permissions in FortiDeceptor.
- Urgency
- Remediation is important to prevent unauthorized access to sensitive log information.
- Action
- Apply patches or restrict access to the affected functionality.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://fortiguard.fortinet.com/psirt/FG-IR-26-138
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-256900.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-25690 | coverage & exploitation status | NVD · CVE.org |
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