A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 th
Affects FortiSandbox 4.4.0 through 4.4.8; FortiSandbox 5.0 is not affected. Fixed in 4.4.9 or above.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 4.4.9 or above
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Fortinet FortiSandbox, a malware analysis appliance, is affected by an OS command injection flaw that stems from improper neutralization of special elements in input. An attacker could potentially exploit this to run unauthorized code or commands on the affected system.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original 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>
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- Record last updated
- CISA remediation deadline
Due date for US federal agencies to patch
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Fortinet FortiSandbox
From 4.4.0 · through 4.4.8
- Fortinet FortiSandbox PaaS
23.4.4374, 23.4.4350, 23.3.4329, 23.1.4245, 22.2.4151, 22.2.4134, 22.1.4113, 21.4.4072, 21.3.4055
References 1
fortiguard.fortinet.com
Questions about CVE-2026-39808
What does this mean?
The flaw is an OS command injection issue that lets an unauthenticated attacker send crafted HTTP requests to run unauthorized code or commands on the FortiSandbox system.Source: fortiguard.fortinet.com
Am I affected, and how do I check?
The advisory covers FortiSandbox 4.4.0 through 4.4.8, while FortiSandbox 5.0 is stated as not affected. FortiSandbox PaaS is listed as a product without a version range, so check the advisory for its details. To check a installed FortiSandbox, compare its version number against 4.4.0 through 4.4.8.Source: fortiguard.fortinet.com
What should I do about it?
Upgrade to FortiSandbox 4.4.9 or above, which the advisory gives as the fix.Source: fortiguard.fortinet.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2026-07-16, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data