Summary
generated automatically from NVD dataCVE-2026-39808 is an OS command injection flaw (CWE-78) in Fortinet FortiSandbox 4.4.0 through 4.4.8, caused by improper neutralization of special elements in operating system commands. It may allow an attacker to execute unauthorized code or commands, and the NVD description does not specify the attack vector. The flaw is rated CRITICAL with a CVSS v3.1 score of 9.8 (network-accessible, no privileges or user interaction required) and is listed in the CISA KEV catalog, which indicates active exploitation.
NVD description
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-07-16. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-07-19
EPSS · FIRST.org
47.4%probability of exploitation in the next 30 days
Higher than 98% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-16, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
We've published a detailed analysis of this CVE — exploitation, IOCs and mitigation.
CVSS v3.1 Score
Information
- Published
- 14 avr. 2026
- Updated
- 17 juil. 2026
- Status
- Analyzed
- Source
- psirt@fortinet.com
Affected products
Weaknesses (CWE)
References (3)
- https://fortiguard.fortinet.com/psirt/FG-IR-26-100Vendor Advisory
- https://github.com/samu-delucas/CVE-2026-39808ExploitThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39808US Government Resource
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