8.8

CVE-2025-53949: fortinet fortisandbox OS Command Injection

CVSS: 8.8v3.1HighAnalyzed
Published 09-12-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-53949 is a high (CVSS 8.8) OS Command Injection vulnerability in fortinet fortisandbox. EPSS estimates a 17.19% chance of exploitation in the next 30 days, higher than 97% of scored vulnerabilities.

Overall risk
39/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
17.19%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an authenticated attacker to execute unauthorized code on the underlying system via crafted HTTP requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

17.19%

Chance of exploitation in the next 30 days

Percentile

97%

Versus all other CVEs

30-day change

0.00 pp

From 17.19% on 20-09-2026

20-09-202620-10-2026
EPSS score
17.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product
  • fortisandbox≥ 4.2.1, ≤ 4.2.8 | ≥ 4.0.0, ≤ 4.0.6 | ≥ 4.2.0, ≤ 4.2.8 | ≥ 4.4.0, ≤ 4.4.7 | ≥ 5.0.0, ≤ 5.0.2

1 vendor · 1 product

References

1 links