CVE-2022-42475

Name: CVE-2022-42475
Creator: NVD / NIST
Published: 2023-01-02T09:15:09.49+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 99.47%

Last modified Jun 17, 2026

CVE-2022-42475 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 99.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

99.47%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jan 3, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Fortinet	Fortios	>= 5.0.0, <= 5.0.14
Fortinet	Fortios	>= 5.2.0, <= 5.2.15
Fortinet	Fortios	>= 5.4.0, <= 5.4.13
Fortinet	Fortios	>= 5.6.0, <= 5.6.14
Fortinet	Fortios	>= 6.0.0, < 6.0.16
Fortinet	Fortios	>= 6.2.0, < 6.2.12
Fortinet	Fortios	>= 6.4.0, < 6.4.11
Fortinet	Fortios	>= 7.0.0, < 7.0.9
Fortinet	Fortios	>= 7.2.0, < 7.2.3
Fortinet	Fortiproxy	>= 1.0.0, <= 1.0.7
Fortinet	Fortiproxy	>= 1.1.0, <= 1.1.6
Fortinet	Fortiproxy	>= 1.2.0, <= 1.2.13
Fortinet	Fortiproxy	>= 2.0.0, < 2.0.12
Fortinet	Fortiproxy	>= 7.0.0, < 7.0.8
Fortinet	Fortiproxy	>= 7.2.0, < 7.2.2
Fortinet	Fortios	>= 6.0.0, < 6.0.15
Fortinet	Fortios	>= 6.4.0, < 6.4.10
Fortinet	Fortios	>= 7.0.0, < 7.0.8

References

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

Timeline

Published: Jan 2, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-42475?

How severe is CVE-2022-42475?

CVE-2022-42475 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 99.47% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2022-42475?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-42475?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST