CVE-2026-84387: improper neutralization of special elements used in a command ('command injection') vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9 may allow attacker to execute unauthorized code or commands via
CVE-2026-84387 key facts
- CISA KEV
- Not listed (catalogue checked )
- Highest advisory rating
- High
- CVSS base score
- 7.2 (Fortinet), 6.7 (Fortinet)
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C· base score 6.7, scored by fortinetAttack vector: network. Attack complexity: low. Privileges required: high. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: high. Availability impact: high.- Weakness
- CWE-77 Execute unauthorized code or commands
- EPSS
- 1.56% chance of exploitation in the next 30 days (75th percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: no. Technical impact: total. CISA, .
- Vendor advisories
- 2 from Fortinet
- Assigned by
- fortinet (CNA)
- CVE record published
- Listed by VulniPulse
Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-84387; each belongs to its advisory, not to every product listed. How records are collected and checked.
Description
An Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability [CWE-77] vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9, FortiSandbox 4.2 all versions may allow a privileged attacker to execute unauthorized code or commands via crafted HTTP requests.
Text from the CVE.org record (fortinet).
How do I fix CVE-2026-84387?
- Upgrade to FortiSandbox version 5.2.1 or above Upgrade to FortiSandbox version 5.0.7 or above Upgrade to FortiSandbox version 4.4.10 or above (CVE.org record)
Vendor advisories for CVE-2026-84387
Fortinet
2 advisories- Advisory severityHigh7.2
High [CVE-2026-84387] improper neutralization of special elements used in a command ('command injection') vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
CVE-2026-84387Source published Source updated
A improper neutralization of special elements used in a command ('command injection') vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9 may allow attacker to execute unauthorized code or commands
- Affected products in this advisory
- FortiSandbox
- Source-reported affected versions
- FortiSandbox FortiSandbox: 4.4 through 5.2 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
- Advisory severityMedium6.7
Medium [CVE-2026-84387] Cron Job Injection in Remote Backup
FG-IR-26-167Source published Source updated
CVSSv3 Score: 6.7 An Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability [CWE-77] in FortiSandbox may allow a privileged attacker to execute unauthorized code or commands via crafted HTTP requests. Revised on 2026-09-08 00:00:00
- Affected products in this advisory
- FortiSandbox
- Source-reported affected versions
- FortiSandbox FortiSandbox: 4.4 through 5.2 (vendor-listed versions)
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
References
Timeline
- CVE record published
- First vendor advisory listed by VulniPulse
- CVE record last updated
More Fortinet advisories
CVE-2026-106170Oct 13, 2026Uncaught Exception vulnerability [CWE-248] vulnerability in Fortinet FortiSandbox 5.2.0CVE-2026-106170Oct 13, 2026Persistent Denial of Service in Admin ProfileCVE-2026-59835Jul 14, 2026Unauthenticated VNC access exposed on all interfacesCVE-2026-39813Apr 14, 2026Unauthenticated Authentication bypass and Privilege escalation in FortiSandboxCVE-2025-67685Jan 13, 2026Server-Side Request Forgery (SSRF) vulnerability [CWE-918] vulnerability in FortinetCVE-2025-61625Nov 10, 2026FortiAnalyzer path traversal
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