CVE-2023-36553
CVE-2023-36553 is a critical-severity vulnerability in Fortinet Fortisiem with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 2% (77th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-78
- Affected product: Fortinet Fortisiem
- Published:
- Last modified:
Description
A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiSIEM version 5.4.0 and 5.3.0 through 5.3.3 and 5.2.5 through 5.2.8 and 5.2.1 through 5.2.2 and 5.1.0 through 5.1.3 and 5.0.0 through 5.0.1 and 4.10.0 and 4.9.0 and 4.7.2 allows attacker to execute unauthorized code or commands via crafted API requests.
Frequently asked questions
- What is CVE-2023-36553?
- A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiSIEM version 5.4.0 and 5.3.0 through 5.3.3 and 5.2.5 through 5.2.8 and 5.2.1 through 5.2.2 and 5.1.0 through 5.1.3 and 5.0.0 through 5.0.1 and 4.10.0 and 4.9.0 and 4.7.2 allows attacker to execute unauthorized code or commands via crafted API requests.
- How severe is CVE-2023-36553?
- CVE-2023-36553 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2023-36553 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-36553?
- CVE-2023-36553 primarily affects Fortinet Fortisiem. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-36553?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2023-36553 published?
- CVE-2023-36553 was published on 2023-11-14 and last updated on 2026-06-17.
References
Affected products (17)
- cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:4.7.2:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:4.9.0:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:4.10.0:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.5:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.6:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.7:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.2.8:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:fortinet:fortisiem:5.4.0:*:*:*:*:*:*:*
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