Critical severity · published Apr 14, 2026
CVE-2026-39813
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…
9.8
CVSS
22.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)22.2% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiSandbox · Fortinet
5.0.0 through 5.0.5; 4.4.0 through 4.4.8 · source: vendor, NVD
FC
FortiSandbox Cloud · Fortinet
24.1; 23.4; 5.0.4 through 5.0.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-39813
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-39813
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-26-112
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