Detections
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CVE-2026-39813

critical

Description

A path traversal: '../filedir' vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8 may allow attacker to escalation of privilege via specially crafted HTTP requests.

References

https://www.securityweek.com/3-recently-patched-fortinet-fortisandbox-vulnerabilities-in-hacker-crosshairs/

https://cyberscoop.com/fortinet-fortisandbox-vulnerabilities-exploits/

https://www.theregister.com/security/2026/06/16/three-critical-fortinet-sandbox-bugs-splattered-by-unknown-attackers/5256461

https://www.helpnetsecurity.com/2026/06/16/fortisandbox-vulnerabilities-cve-2026-39813-cve-2026-39808-cve-2026-25089/

https://www.bleepingcomputer.com/news/security/critical-fortinet-fortisandbox-flaws-now-exploited-in-attacks/

https://thehackernews.com/2026/06/attackers-exploit-three-fortinet.html

https://securityaffairs.com/193709/ai/fortinet-warned-as-three-critical-fortisandbox-bugs-come-under-attack.html

https://www.helpnetsecurity.com/2026/04/16/fortinet-fortisandbox-vulnerabilities-cve-2026-39813-cve-2026-39808/

https://www.theregister.com/2026/04/15/critical_fortinet_sandbox_bugs/

https://www.securityweek.com/fortinet-patches-critical-fortisandbox-vulnerabilities/

https://thehackernews.com/2026/04/april-patch-tuesday-fixes-critical.html

https://fortiguard.fortinet.com/psirt/FG-IR-26-112

Details

Source: Mitre, NVD

Published: 2026-04-14

Updated: 2026-06-18

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.23643

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest