Is CVE-2022-42475 being actively exploited?

Yes. CVE-2022-42475 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on December 13, 2022.

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

CVE-2022-42475 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2022-42475

CRITICAL · CVSS 9.8CISA KEV: actively exploitedEPSS 99.5%EU EUVD: exploited

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.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-197
EPSS score: 99.5% (100th percentile)
In CISA KEV: Yes, added December 13, 2022
In EU EUVD: Yes (EUVD-2022-45545)
Published: January 2, 2023
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability

Added to the KEV catalog on December 13, 2022; federal remediation due January 3, 2023. Known to be used in ransomware campaigns.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-45545 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

fortinet / fim-7901e
fortinet / fim-7904e
fortinet / fim-7910e
fortinet / fim-7920e
fortinet / fim-7921f
fortinet / fim-7941f
fortinet / fortigate-6300f
fortinet / fortigate-6300f-dc
fortinet / fortigate-6500f
fortinet / fortigate-6500f-dc
fortinet / fortigate-6501f
fortinet / fortigate-6501f-dc
fortinet / fortigate-6601f
fortinet / fortigate-6601f-dc
fortinet / fortigate-7030e
fortinet / fortigate-7040e
fortinet / fortigate-7060e
fortinet / fortigate-7121f
fortinet / fortios
fortinet / fortiproxy
fortinet / fpm-7620e
fortinet / fpm-7620f
fortinet / fpm-7630e

Certified products that may be affected

6 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Fortinet, Inc. FortiOS 7.0.7 - Fortinet, Inc. - Common Criteria NSCIB-CC-0590233-CR - active
FortiGate/FortiOS Version 6.2.7 - Fortinet, Inc. - Common Criteria 559-LSS - archived
FortiOS 5.6 - Fortinet, Inc. - FIPS 140 3639 - historical
FortiProxy-400E/2000E/4000E - Fortinet, Inc. - FIPS 140 3628 - historical
Fortinet FortiProxy v1.0 - Fortinet, Inc. - Common Criteria 383-4-475 - archived

See all 6 in the Security Certifications Explorer.

References

https://fortiguard.com/psirt/FG-IR-22-398(Exploit, Mitigation, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-42475(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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