CVE-2022-42475
Fortinet FortiOS Heap-Based Buffer Overflow Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 January 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 99.47% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 13 December 2022 · due 3 January 2023 · used in ransomware campaigns
- Weakness
- CWE-197, CWE-787
- Affected
- fortinet/fortios · fortinet/fortiproxy
- Source
- psirt@fortinet.com
EPSS 99.5% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://www.fortiguard.com/psirt/FG-IR-22-398; https://nvd.nist.gov/vuln/detail/CVE-2022-42475
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.