CVE-2023-34992
CriticalPublic exploitA improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet allows attacker to execute unauthorized code or commands via crafted API requests.
Published Oct 11, 2023 · Updated Jan 14, 2026
Key Facts
Patch immediately- CVE-2023-34992 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Fortisiem (Fortinet).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 82% probability of exploitation in the next 30 days.
- Fixed versions are available, including Fortisiem <=6.6.3, Fortisiem 6.6.3.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
82%
Higher than 99.6% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet allows attacker to execute unauthorized code or commands via crafted API requests.
Affected Products
17 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FortisiemFortinet | 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.0, 6.6.1, 6.6.2 | 6.6.3 |
Patched Releases
Fortisiem
<=6.6.3
Timeline
Publicly disclosed
Oct 11, 2023
Last updated
Jan 14, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryhttps://fortiguard.com/psirt/FG-IR-23-130
- advisoryhttps://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-40718
- advisoryhttps://www.fortiguard.com/psirt/FG-IR-21-233
- advisoryhttps://www.fortiguard.com/psirt/FG-IR-22-235
- advisoryhttps://www.fortiguard.com/psirt/FG-IR-23-130
FAQ
Common Questions.
A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet allows attacker to execute unauthorized code or commands via crafted API requests.
Affected: Fortisiem (Fortinet) versions 6.4.0, 6.4.1, 6.4.2, 6.5.0, 6.5.1, 6.6.0, 6.6.1, 6.6.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Fortisiem <=6.6.3, Fortisiem 6.6.3.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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