Vulnerability

CVE-2025-66178

High· 7.2CVSS7.2EPSS2%

.rules3/5

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow an authenticated attacked to execute arbitrary commands via a specialy crafted HTTP request.

Threat signal

75/100

High

Severity

high

CVSS

7.2

EPSS

Active

CVSS

v3.1via NVDOpen in FIRST calculator →

7.2/ 10HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredHighAdmin / root privileges required.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

1.70%

probability of exploitation in next 30 days

p77

higher than 77% of all CVEs

5-day trend↑ 0pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2025-66178. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCTrack

Total impact on non-trivial mission systems

exploitation: none
automatable: no
impact: total
mission: support

Lifecycle

2026-03-10Published
2026-10-21Last modified1 source

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-088