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CVE-2026-25089

Fortinet FortiSandbox OS Command Injection

9.8 CRITICALActively exploited (CISA KEV)EPSS 76.1%
  1. Published9 Jun 2026
  2. Added to CISA KEV16 Jul 2026
  3. Remediation due19 Jul 2026
Actively exploited (CISA KEV)

Fortinet FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS contain an OS command injection vulnerability that allows an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.

Added to KEV: 16 Jul 2026Federal remediation due: 19 Jul 2026

Description

A improper neutralization of special elements used in an os command ('os command injection') 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 Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet Fortisandbox≥ 4.2.0 ≤ 4.2.8 · ≥ 4.4.0 < 4.4.9 · ≥ 5.0.0 < 5.0.6
Fortinet Fortisandbox Cloud≥ 5.0.4 < 5.0.6
Fortinet Fortisandbox Paas≥ 5.0.4 < 5.0.6

Remediation

Fixed in
Fortinet Fortisandbox≥ 4.4.9
Fortinet Fortisandbox Cloud≥ 5.0.6
Fortinet Fortisandbox Paas≥ 5.0.6

References

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Frequently asked

Is CVE-2026-25089 being actively exploited?

Yes. CVE-2026-25089 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 16 Jul 2026.

How severe is CVE-2026-25089?

CVE-2026-25089 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 76.1% probability of exploitation.

Which products are affected by CVE-2026-25089?

Affected products include Fortinet Fortisandbox, Fortinet Fortisandbox Cloud, Fortinet Fortisandbox Paas.

How do I fix CVE-2026-25089?

Upgrade affected software to a fixed version, for example Fortinet Fortisandbox 4.4.9, Fortinet Fortisandbox Cloud 5.0.6, Fortinet Fortisandbox Paas 5.0.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-25089 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.