What is CVE-2026-25690?

CVE-2026-25690 is a medium-severity vulnerability in Fortinet Fortideceptor, classified under Argument Injection. CVSS score: 4.3/10. Published 2026-05-12.

How severe is CVE-2026-25690?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Fortinet Fortideceptor

CVE-2026-25690

An improper neutralization of argument delimiters in a command ('argument injection') vulnerability in Fortinet FortiDeceptor 6.0.0 through 6.0.2, FortiDeceptor 5.3.0 through 5.3.3, FortiDeceptor 5.2.0 through 5.2.1, FortiDeceptor 5.1 all…

EPSS: 0.000 (15.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Fortinet Fortideceptor — versions 5.2.0, 5.2.1, 5.3.0

Weakness classification (CWE)

CWE-88 — Argument Injection

References

psirt@fortinet.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-25690?: CVE-2026-25690 is a medium-severity vulnerability in Fortinet Fortideceptor, classified under Argument Injection. CVSS score: 4.3/10. Published 2026-05-12.
How severe is CVE-2026-25690?: Medium severity. CVSS v3 base score is 4.3 out of 10.