9.8

CVE-2025-64155: fortinet fortisiem OS Command Injection

CVSS: 9.8v3.1CriticalModified
Published 13-01-2026Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-64155 is a critical (CVSS 9.8) OS Command Injection vulnerability in fortinet fortisiem. EPSS estimates a 42.54% chance of exploitation in the next 30 days, higher than 98.6% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
42.54%
0%100%
High · -2.88 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2github

Timeline

  1. 13-01-2026
    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 in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.1.0 through 7.1.8, FortiSIEM 7.0.0 through 7.0.4, FortiSIEM 6.7.0 through 6.7.10 may allow an attacker to execute unauthorized code or commands via crafted TCP requests.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

42.54%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

-2.88 pp

From 45.43% on 19-09-2026

19-09-202619-10-2026
EPSS score
42.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • githubUnverified

    Cve 2025 64155

    Maturity: poc

  • githubUnverified

    Cve 2025 64155 Hunter

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Fortinet1 product
  • fortisiem≥ 7.3.0, ≤ 7.3.4 | 7.2.6 | 7.1.8 | 7.0.4 | 6.7.10 | ≥ 6.7.0, < 7.1.9 | ≥ 7.2.0, < 7.2.7 | ≥ 7.3.0, < 7.3.5 | 7.4.0

1 vendor · 1 product

References

3 links