CVE-2026-39813

criticalpriority · track · 18EPSS 0.222 · 98 %ileexploit · PoCDEEUNLRUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

22.2% (98th) EPSS

CVSS 9.8 · critical

Is it mine?

18 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:Csecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · psirt@fortinet.comexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-24USCWE-24USCWE-24US

exploits (2)

Public proof-of-concept and weaponised exploit code.

0xBlackash/CVE-2026-39813CVE-2026-39813PoC · poc_in_github
HORKimhab/CVE-2026-39813CVE-2026-39813 - Fortinet Sandbox - Draft PoC · poc_in_github

affected products (18)

Products and version ranges known to be affected.

Fortinet FortiSandbox <4.4.9all versionscert_bundDE
Fortinet FortiSandbox <5.0.5all versionscert_bundDE
Fortinet FortiSandbox <5.0.6all versionscert_bundDE
Fortinet FortiSandbox< 4.4.9cert_bundDE
Fortinet FortiSandbox< 5.0.5cert_bundDE
Fortinet FortiSandbox< 5.0.6cert_bundDE
Fortinet FortiSandbox≤ 4.4.0 ≤4.4.8enisa_euvdEU
Fortinet FortiSandbox≤ 5.0.0 ≤5.0.5enisa_euvdEU
Fortinet FortiSandbox Cloud≤ 24.1enisa_euvdEU
Fortinet FortiSandbox Cloud≤ 5.0.4 ≤5.0.5enisa_euvdEU
Fortinet FortiSandbox Cloud≤ 23.4enisa_euvdEU
Fortinet Inc. FortiSandbox4.4.0 → 4.4.9fstec_bduRU
Fortinet Inc. FortiSandbox5.0.0 → 5.0.6fstec_bduRU
Fortinet FortiSandbox≤ vers:unknown/*ncsc_nlNL
Fortinet FortiSandbox Cloud≤ vers:unknown/*ncsc_nlNL
Fortinet FortiSandbox PaaS≤ vers:unknown/*ncsc_nlNL
fortinet fortisandbox4.4.0 → 4.4.9nvdUScpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*
fortinet fortisandbox5.0.0 → 5.0.6nvdUScpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

NCSC-2026-0121Kwetsbaarheden verholpen in Fortinet FortiSandboxNL2026-04-15csaf · ncsc_nlNL
Fortinet heeft meerdere kwetsbaarheden verholpen in FortiSandbox, waaronder in on-premises versies en FortiSandbox Cloud, waarvan twee door Fortinet als kritiek zijn beoordeeld.
WID-SEC-W-2026-1094Fortinet FortiSandbox: Mehrere SchwachstellenDeutsch2026-04-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Fortinet FortiSandbox ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen, Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und Code zur Ausführung zu bringen.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund ncsc_nl nvd NVD CVE.org MITRE

published 2026-04-14modified 2026-10-26

references (3)

External citations — patches, advisories, analysis.

scry

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