How severe is CVE-2023-36634?

CVE-2023-36634 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-36634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36634?

CVE-2023-36634 primarily affects Fortinet Fortiap-u. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-36634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-36634 published?

CVE-2023-36634 was published on 2023-09-13 and last updated on 2026-06-17.

CVE-2023-36634

CVE-2023-36634 is a high-severity vulnerability in Fortinet Fortiap-u with a CVSS 3.x base score of 7.1. 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-73.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-73
Affected product: Fortinet Fortiap-u
Published: 2023-09-13
Last modified: 2026-06-17

Description

An incomplete filtering of one or more instances of special elements vulnerability [CWE-792] in the command line interpreter of FortiAP-U 7.0.0, 6.2.0 through 6.2.5, 6.0 all versions, 5.4 all versions may allow an authenticated attacker to list and delete arbitrary files and directory via specially crafted command arguments.

Frequently asked questions

What is CVE-2023-36634?: An incomplete filtering of one or more instances of special elements vulnerability [CWE-792] in the command line interpreter of FortiAP-U 7.0.0, 6.2.0 through 6.2.5, 6.0 all versions, 5.4 all versions may allow an authenticated attacker to list and delete arbitrary files and directory via specially crafted command arguments.
How severe is CVE-2023-36634?: CVE-2023-36634 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-36634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36634?: CVE-2023-36634 primarily affects Fortinet Fortiap-u. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-36634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-36634 published?: CVE-2023-36634 was published on 2023-09-13 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-23-123

Affected products (2)

cpe:2.3:a:fortinet:fortiap-u:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiap-u:7.0.0:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiap-u

CVE-2022-29058 — High (CVSS 7.8): An improper neutralization of special elements [CWE-89] used in an OS command vulnerability [CWE-78] in the command…
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CVE-2025-53680 — Medium (CVSS 6.7): An improper neutralization of special elements used in an OS command ("OS Command Injection") vulnerability [CWE-78]…
CVE-2019-15708 — Medium (CVSS 6.7): A system command injection vulnerability in the FortiAP-S/W2 6.2.1, 6.2.0, 6.0.5 and below, FortiAP 6.0.5 and below and…
CVE-2019-15709 — Medium (CVSS 6.5): An improper input validation in FortiAP-S/W2 6.2.0 to 6.2.2, 6.0.5 and below, FortiAP-U 6.0.1 and below CLI admin…
CVE-2023-25608 — Medium (CVSS 5.5): An incomplete filtering of one or more instances of special elements vulnerability [CWE-792] in the command line…

All CVEs affecting Fortinet Fortiap-u →

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