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CVE-2026-25089 — Fortinet FortiSandbox OS Command Injection Vulnerability

CVE-2026-25089 · FortiSandbox · CVSS 9.8 · KEV

In brief

Severity · CVSS
Critical9.8CVSS 3.1, Critical
EPSS
76%
CISA KEV
Known exploited, listed since 16 Jul 2026
Vendor
Fortinet
Products
FortiSandbox
Published · Modified
·
Last verified

Summary

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

Weakness: CWE-78

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

4 branches with a published fixed release · 1 branch without a precise fixed release

Fortinet FortiSandbox

Source: FG-IR-26-141CVE-2026-25089

  1. 5.2
    Affected versionsNot affected
    First fixed release—
  2. 5.0
    Affected versions5.0.0 – 5.0.5
    First fixed release5.0.6
  3. 4.4
    Affected versions4.4.0 – 4.4.8
    First fixed release4.4.9
  4. 4.2End of life
    Affected versions4.2.1 – 4.2.8
    First fixed releaseNot published in the sources followed

Releases the vendor does not list are not affected.

Fortinet FortiSandbox Cloud

Source: FG-IR-26-141CVE-2026-25089

  1. 5.2
    Affected versionsNot affected
    First fixed release—
  2. 5.0
    Affected versions5.0.4 – 5.0.5
    First fixed release5.0.6
  3. 4.4
    Affected versionsNot affected
    First fixed release—

Releases the vendor does not list are not affected.

Fortinet FortiSandbox PaaS

Source: FG-IR-26-141CVE-2026-25089

  1. 23.4
    Affected versionsNot affected
    First fixed release—
  2. 5.2
    Affected versionsNot affected
    First fixed release—
  3. 5.0
    Affected versions5.0.4 – 5.0.5
    First fixed release5.0.6
  4. 4.4
    Affected versionsNot affected
    First fixed release—

Releases the vendor does not list are not affected.

Remediation

Fix available

Vendor fix

  • FortiSandbox 5.05.0.6
  • FortiSandbox 4.44.4.9
  • FortiSandbox Cloud 5.05.0.6
  • FortiSandbox PaaS 5.05.0.6

Upgrade to a fixed release listed above for your branch, or to a later fixed release the vendor explicitly supports.

Upgrade to upcoming FortiSandbox version 5.2.0 or above Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox version 4.4.9 or above Upgrade to upcoming FortiSandbox PaaS version 5.2.0 or above Upgrade to FortiSandbox PaaS version 5.0.6 or above Fortinet remediated this issue in FortiSandbox Cloud

Full text

version 5.2.0 (not released) and hence customers do not need to perform any action. Fortinet remediated this issue in FortiSandbox Cloud version 5.0.6 (not released) and hence customers do not need to perform any action.

SourceFortinet (CVE record)

SourceFortiGuard FG-IR-26-141

CISA KEV required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes).

Full CISA action

Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA due date:

SourceCISA KEV

CERT-FR recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

SourceCERTFR-2026-AVI-0725

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 16 Jul 2026

Federal remediation due date: 19 Jul 2026

The CISA required action is shown under Remediation.

76% probability of exploitation in the next 30 days (percentile 100%).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CERT-FR

1 document of the French national CERT (ANSSI) references this CVE.

Advisory (AVI)CERTFR-2026-AVI-0725Published 10 Jun 2026

Multiple vulnerabilities in Fortinet products

Remote arbitrary code executionData confidentiality breach

Summary

Multiple vulnerabilities have been discovered in Fortinet products. They allow an attacker to cause remote arbitrary code execution and a data confidentiality breach.

Recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

Official document on cert.ssi.gouv.frread by Patcharo 28 Sept 2026 at 20:03 UTCMachine translation of the French text published by CERT-FR; a text whose translation did not pass Patcharo's checks stays in French. Identifiers, versions and links are copied unchanged.

Timeline

  1. Published by the source
  2. Added to CISA KEV
  3. CISA remediation due date
  4. Source record last modified
  5. EPSS score computed
  6. Last verified by Patcharo

Official sources

References

Fortinet · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS · FortiGuard FG-IR-26-141

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: FortiOS version numbering: branches, patch releases and the Feature and Mature labels

Related vulnerabilities

Other records affecting the same products, newest first.

  • CVE-2026-39808Fortinet FortiSandbox OS Command Injection VulnerabilityCriticalKEV

All FortiSandbox vulnerabilitiesAll Fortinet vulnerabilities