How severe is CVE-2022-42478?

CVE-2022-42478 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-42478 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-42478?

CVE-2022-42478 primarily affects Fortinet Fortisiem. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-42478?

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-2022-42478 published?

CVE-2022-42478 was published on 2023-06-13 and last updated on 2026-06-17.

CVE-2022-42478

CVE-2022-42478 is a high-severity vulnerability in Fortinet Fortisiem with a CVSS 3.x base score of 8.1. 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-307.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-307
Affected product: Fortinet Fortisiem
Published: 2023-06-13
Last modified: 2026-06-17

Description

An Improper Restriction of Excessive Authentication Attempts [CWE-307] in FortiSIEM below 7.0.0 may allow a non-privileged user with access to several endpoints to brute force attack these endpoints.

Frequently asked questions

What is CVE-2022-42478?: An Improper Restriction of Excessive Authentication Attempts [CWE-307] in FortiSIEM below 7.0.0 may allow a non-privileged user with access to several endpoints to brute force attack these endpoints.
How severe is CVE-2022-42478?: CVE-2022-42478 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-42478 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-42478?: CVE-2022-42478 primarily affects Fortinet Fortisiem. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-42478?: 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-2022-42478 published?: CVE-2022-42478 was published on 2023-06-13 and last updated on 2026-06-17.

References

https://fortiguard.com/psirt/FG-IR-22-258

Affected products (23)

cpe:2.3:a:fortinet:fortisiem:*:*:*:*:*:*:*:*
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:5.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.2.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.2.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.5.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.5.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.6.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.6.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.6.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.6.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisiem:6.7.0:*:*:*:*:*:*:*

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