CVE-2026-39813 (GCVE-0-2026-39813)

Vulnerability from cvelistv5 – Published: 2026-04-14 15:38 – Updated: 2026-11-06 15:42
VLAI CIRCL Previdian
Summary
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.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 00:00 UTC
CWE
  • CWE-24 - Escalation of privilege
Assigner
fortinet CNA under the mitre root
CNA scorecard C 72/100 over 145 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Fortinet FortiSandbox Affected: 5.0.0 , ≤ 5.0.5 (semver)
Affected: 4.4.0 , ≤ 4.4.8 (semver)
    cpe:2.3:a:fortinet:fortisandbox:5.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:5.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:5.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:5.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:5.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:5.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.8:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.7:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.6:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.5:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:fortinet:fortisandbox:4.4.0:*:*:*:*:*:*:*
Create a notification for this product.
CIRCL
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fee93255-19dd-4e3c-b8ea-5c30109a62bf

Vulnerability ID: CVE-2026-39813

Status: Confirmed

Status Updated: 2026-06-22 10:49 UTC

Exploited: Yes

Characteristics
Remote Code Execution: No
Authentication Required: No
Local Access Required: Remote
Severity: 100.0
Timestamps
First Seen: 2026-06-22
Asserted: 2026-06-22
Last Seen: 2026-06-22
Created: 2026-06-22 10:49 UTC | Updated: 2026-06-22 10:49 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5c9f9de2-5560-4056-9ed6-937928435f16

Vulnerability ID: CVE-2026-39813

Status: Confirmed

Status Updated: 2026-06-16 15:17 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-16
Asserted: 2026-06-16
Scope
Notes: KEVIntel entry: 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... | Affected: Fortinet / FortiSandbox, FortiSandbox Cloud | CVSS: 9.1 (CRITICAL) | EPSS: 0.18703 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Fortinet
Product FortiSandbox, FortiSandbox Cloud
Added Date 2026-06-16T15:17:57.989Z
Cvss Score 9.1
Epss Score 0.18703
Cvss Severity CRITICAL
Epss Percentile 0.96902
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 14:02 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Solutions

CNA · fortinet
Upgrade to 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

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Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.