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VulnerabilityPublished

CVE-2026-39812: Fortinet FortiSandbox · Execute Unauthorized Code or Commands

Affects Fortinet FortiSandboxSource CVE Database V5

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Public exploit available · CVSS 4.3 Medium · patch available : patch Fortinet FortiSandbox as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
FortinetFortiSandboxAffected
  • >=5.0.0 <=5.0.4
  • >=4.4.0 <=4.4.8
  • >=4.2.1 <=4.2.8
Fixed in–
FortinetFortiSandbox PaaSAffected
  • >=5.0.0 <=5.0.5
  • >=4.4.0 <=4.4.8
  • >=4.2.1 <=4.2.8
Fixed in–

CPE configurations (45)

  • cpe:2.3:a:fortinet:fortisandbox:5.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:fortinet:fortisandbox:5.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:fortinet:fortisandbox:5.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:fortinet:fortisandbox:5.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:fortinet:fortisandbox:5.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:fortinet:fortisandbox:4.4.8:*:*:*:*:*:*:*

AI-suggested

An official patch is available from Fortinet to remediate this vulnerability. Users of affected FortiSandbox versions should apply the vendor-provided updates promptly to mitigate the risk. Since this is not a cloud service, remediation depends on customer action to deploy the fix.

Description

A improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all versions, FortiSandbox PaaS 5.0.0 through 5.0.5, FortiSandbox PaaS 4.4.0 through 4.4.8, FortiSandbox PaaS 4.2 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

References

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