Is CVE-2022-42475 in the CISA KEV catalog?

Yes. CVE-2022-42475 is on the CISA Known Exploited Vulnerabilities list, added 2022-12-13, and has known ransomware campaign use.

What is the CVSS severity of CVE-2022-42475?

CVE-2022-42475 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-42475?

CVE-2022-42475 has an EPSS score of 99.47% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2022-42475

CRITICALCISA KEVEPSS 100th pctl

9.8

CVSS v3

NVD

Description

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11, 6.0.15 and earlier and FortiProxy SSL-VPN 7.2.0 through 7.2.1, 7.0.7 and earlier may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests.

CWE-197 CWE-787Out-of-bounds Write

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

99.47%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability

Multiple versions of Fortinet FortiOS SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute arbitrary code or commands via specifically crafted requests.

Apply updates per vendor instructions.

Remediation due: 2023-01-03

Associated with ransomware campaigns

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-24.