How severe is CVE-2023-27999?

CVE-2023-27999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-27999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27999?

CVE-2023-27999 primarily affects Fortinet Fortiadc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27999?

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-2023-27999 published?

CVE-2023-27999 was published on 2023-05-03 and last updated on 2026-06-17.

CVE-2023-27999

CVE-2023-27999 is a high-severity vulnerability in Fortinet Fortiadc with a CVSS 3.x base score of 7.8. 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: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Fortinet Fortiadc
Published: 2023-05-03
Last modified: 2026-06-17

Description

An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiADC 7.2.0, 7.1.0 through 7.1.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.

Frequently asked questions

What is CVE-2023-27999?: An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiADC 7.2.0, 7.1.0 through 7.1.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.
How severe is CVE-2023-27999?: CVE-2023-27999 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-27999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27999?: CVE-2023-27999 primarily affects Fortinet Fortiadc. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27999?: 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-2023-27999 published?: CVE-2023-27999 was published on 2023-05-03 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-297

Affected products (2)

cpe:2.3:a:fortinet:fortiadc:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiadc:7.2.0:*:*:*:*:*:*:*

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