CVE-2022-42475
Fortinet FortiOS: Heap-Based Buffer Overflow
As of , CVE-2022-42475 in Fortinet FortiOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 13 December 2022
- US federal deadline
- 3 January 202321 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- KnownCISA changed it from Unknown to Known on 7 April 2025.
- EPSS score
- 0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- No score that dayThe EPSS file of the day CISA listed it has no score for it.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- Vendor advice: www.fortiguard.comLinks below, from CISA's entry.
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
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.
CISA's 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.
The CVE record's description, from fortinet
- CVE published
- 2 January 2023
- Assigned by
- fortinet
- CVSS
- 9.3 Critical (CVSS 3.1, from the CNA)
- CWE-197
- Numeric Truncation Error
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- CISA added it to its list of exploited vulnerabilities.
- The CVE record was published.
- The US federal deadline to fix it.
- CISA changed its entry. Ransomware use: Unknown to Known.
FortiOS: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2018-13379SSL VPN Path Traversal | Fortinet FortiOS | Patch this weekRansomware use; Metasploit module; EPSS 0.99 | 0.99 | ||
| CVE-2024-21762Out-of-Bound Write | Fortinet FortiOS | Patch this weekRansomware use; EPSS 0.83 | 0.83 | ||
| CVE-2020-12812SSL VPN Improper Authentication | Fortinet FortiOS | Patch this weekRansomware use | 0.45 | ||
| CVE-2019-5591Default Configuration | Fortinet FortiOS | Patch this weekRansomware use | 0.18 | ||
| CVE-2019-6693Use of Hard-Coded Credentials | Fortinet FortiOS | Patch this weekRansomware use | 0.06 | ||
| CVE-2025-68686Exposure of Sensitive Information to an Unauthorized Actor | Fortinet FortiOS | Patch soon | 0.30 | ||
| CVE-2022-41328Path Traversal | Fortinet FortiOS | Patch soon | 0.11 | ||
| CVE-2021-44168Arbitrary File Download | Fortinet FortiOS | Patch soon | 0.01 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org