# CVE-2022-42475: Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability

> CVE-2022-42475: Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability. CVSS 9.3 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2022-42475
Last updated: 2025-10-21T23:15:29Z

- Published: 2023-01-02 08:18 UTC · Updated: 2025-10-21 23:15 UTC · Assigner: fortinet
- CVSS: 9.3 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C
- EPSS: 99.5%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-12-13, federal due date 2023-01-03, ransomware use: Known
- CWE: CWE-197

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Fortinet: FortiOS
- Fortinet: FortiProxy

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-42475)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2022-42475)
- [https://fortiguard.com/psirt/FG-IR-22-398](https://fortiguard.com/psirt/FG-IR-22-398)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2022-42475 · Markdown: https://rewindex.com/cve/CVE-2022-42475.md · JSON: https://rewindex.com/api/v1/cves/CVE-2022-42475 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:05:41.810Z