What is CVE-2026-39808?
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>
Timeline
- 2026-04-14Published to the U.S. National Vulnerability Database (NVD)
- 2026-06-17First covered in a defend.network daily briefing
- 2026-07-16Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
- 2026-07-17NVD record last updated
- 2026-07-19CISA federal remediation deadline (BOD 22-01)
CISA Known Exploited Vulnerability
Fortinet FortiSandbox OS Command Injection Vulnerability
Affected product
Fortinet FortiSandbox
Remediation Steps
- Apply the vendor security update for Fortinet Fortisandbox as a priority.
- Restrict network exposure of the affected service to trusted sources until patched.
- Review logs and detections for indicators of exploitation.
- Confirm fixed versions against the official vendor advisory before deploying.
References
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 3 of July 2026 (July 20 – 26)
- Vulnerability Priority Report – Week 2 of July 2026 (July 13 – 19)
- Vulnerability Priority Report – Week 3 of June 2026 (June 15 – 21)
- WordPress, OpenSSL, Fortinet zero-days: patches shipped and KEV escalations (2026-07-18)
- Fortinet actively exploited; Rokarolla targets 217 banking apps; Google Vertex AI flaw (2026-06-17)
Browse all tracked CVEs in the defend.network CVE database →
🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.