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2822 articles · 164157 vulns · 37/41 feeds (7d)
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9.1
CVE-2026-39808KEVEXPLOITEDPATCHED
fortinet · fortisandbox

CVE-2026-39808: A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet F

Description

CVE-2026-39808 is an OS command injection flaw that can be exploited to execute arbitrary code or commands.

Affected Products

VendorProductVersions
fortinetfortisandbox4.4.0, 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

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
fortinetfortisandbox paasmitre_affected90%

References

  • https://fortiguard.fortinet.com/psirt/FG-IR-26-100
  • https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-39808.yaml(exploit, nuclei)

Related News (10 articles)

Tier D
Heise Security2h ago
Angriffe auf FortiSandbox-Schwachstellen
→ No new info (linked only)
Tier D
SecurityWeek7h ago
3 Recently Patched Fortinet FortiSandbox Vulnerabilities in Hacker Crosshairs
→ No new info (linked only)
Tier D
The Hacker News58d ago
⚡ Weekly Recap: Vercel Hack, Push Fraud, QEMU Abused, New Android RATs Emerge & More
→ No new info (linked only)
Tier D
Help Net Security59d ago
Week in review: Acrobat Reader flaw exploited, Claude Mythos offensive capabilities and limits
→ No new info (linked only)
Tier D
Help Net Security62d ago
Fortinet fixes critical FortiSandbox vulnerabilities (CVE-2026-39813, CVE-2026-39808)
→ No new info (linked only)
Tier D
SecurityWeek63d ago
Fortinet Patches Critical FortiSandbox Vulnerabilities
→ No new info (linked only)
Tier D
Heise Security63d ago
Fortinet stopft 18 Sicherheitslecks
→ No new info (linked only)
Tier B
CERT-FR63d ago
Multiples vulnérabilités dans les produits Fortinet (15 avril 2026)
→ No new info (linked only)
Tier C
VulDB63d ago
CVE-2026-39808 | Fortinet FortiSandbox/FortiSandbox PaaS up to 4.4.8 os command injection (FG-IR-26-100)
→ No new info (linked only)
Tier A
Fortinet PSIRT64d ago
OS Command Injection through API endpoint
→ No new info (linked only)
CVSS 3.19.1 CRITICAL
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CISA KEV✅ Yes
Actively exploited✅ Yes
Patch available
4.4.9
CWECWE-78
PublishedApr 14, 2026
Last enriched7h agov6
Tags
FortiSandbox PaaSFortiSandboxunauthenticated accessHTTP request exploitation
Trending Score152🔥
Source articles10
Independent7
Info Completeness11/14
Missing: epss, iocs, mitre_attack

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Related CVEs (5)

CRITICALCVE-2026-39813EXPKEV
CVE-2026-39813: A path traversal: '../filedir' vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.
Trending: 147
CRITICALCVE-2026-25089EXP
CVE-2026-25089: A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet F
Trending: 94
CRITICALCVE-2026-35616EXPKEV
CVE-2026-35616: A improper access control vulnerability in Fortinet FortiClientEMS 7.4.5 through 7.4.6 may allow an unauthenticated atta
Trending: 71
CRITICALCVE-2026-26083
CVE-2026-26083: A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, Fo
Trending: 66
MEDIUMCVE-2025-61624EXP
CVE-2025-61624: An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') [CWE-22] vulnerability in Fortinet For
Trending: 56

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Verification

State: verified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 14, 2026
Added to CISA KEV
Apr 14, 2026
Discovered by ZDM
Apr 14, 2026
Updated: affectedVersions, exploitAvailable, activelyExploited, patchAvailable
Apr 14, 2026
Updated: tags
Apr 14, 2026
Updated: affectedVersions
Apr 15, 2026
Updated: description, tags
Apr 16, 2026
Actively Exploited
Apr 22, 2026
Exploit Available
Apr 22, 2026
Patch Available
Apr 22, 2026
Updated: description
Jun 17, 2026

Version History

v6
Last enriched 7h ago
v6Tier D7h ago

Updated description to clarify the nature of the vulnerability and confirmed severity as CRITICAL.

description
via SecurityWeek
v5Tier D62d ago

Updated description with details on unauthenticated access and exploitation via specially crafted HTTP requests, and added new relevant tags.

descriptiontags
via Help Net Security
v4Tier D63d ago

Updated affected versions to include 5.0.6 and provided a more detailed description of the vulnerability.

affectedVersions
via Heise Security
v3Tier C63d ago

Updated description with new details and added tag for FortiSandbox PaaS.

tags
via VulDB
v2Tier A63d ago

Updated affected versions to include 4.4.9, marked exploit as available, and noted that the vulnerability is actively exploited.

affectedVersionsexploitAvailableactivelyExploitedpatchAvailable
via Fortinet PSIRT
v163d ago

Initial creation