How severe is CVE-2021-22123?

CVE-2021-22123 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2021-22123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22123?

CVE-2021-22123 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22123?

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-2021-22123 published?

CVE-2021-22123 was published on 2021-06-01 and last updated on 2026-06-17.

CVE-2021-22123

CVE-2021-22123 is a high-severity vulnerability in Fortinet Fortiweb with a CVSS 3.x base score of 7.6. Its EPSS exploit-prediction score of 77% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.6)
CVSS v2: 9.0
EPSS exploit prediction: 77% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Fortinet Fortiweb
Published: 2021-06-01
Last modified: 2026-06-17

Description

An OS command injection vulnerability in FortiWeb's management interface 6.3.7 and below, 6.2.3 and below, 6.1.x, 6.0.x, 5.9.x may allow a remote authenticated attacker to execute arbitrary commands on the system via the SAML server configuration page.

Frequently asked questions

What is CVE-2021-22123?: An OS command injection vulnerability in FortiWeb's management interface 6.3.7 and below, 6.2.3 and below, 6.1.x, 6.0.x, 5.9.x may allow a remote authenticated attacker to execute arbitrary commands on the system via the SAML server configuration page.
How severe is CVE-2021-22123?: CVE-2021-22123 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2021-22123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 77% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22123?: CVE-2021-22123 affects Fortinet Fortiweb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22123?: 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-2021-22123 published?: CVE-2021-22123 was published on 2021-06-01 and last updated on 2026-06-17.

References

https://fortiguard.com/advisory/FG-IR-20-120

Affected products (1)

cpe:2.3:a:fortinet:fortiweb:*:*:*:*:*:*:*:*

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