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CVE-2022-42475

Published: Jan 2, 2023Updated: Oct 24, 2025 Sources: CVE List NVD BDU csafCWE-197
9.8CRITICAL
NVD MITRE
EPSS Score
99.5%
Top 0.1%
CISA KEV
Active Exploitation
Since Dec 13, 2022
Exploits
1 Known
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

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.

In plain language

AI Act now

CVE-2022-42475 is a critical security flaw in Fortinet FortiOS and FortiProxy SSL-VPN that can let an attacker, without logging in, run code; if you use Fortinet SSL-VPN/ FortiProxy, you should act immediately.

What to do

  1. Check what Fortinet product you run (FortiOS / FortiProxy) and its exact version, then plan an immediate upgrade to a fixed release.
  2. If you can’t upgrade right away, restrict access to SSL-VPN/FortiProxy (for example, allow only known IP addresses or limit exposure to the internet) with help from your IT provider.
  3. Ask your IT/security person to confirm whether any systems are reachable from the internet and to monitor for signs of unusual activity on the SSL-VPN/FortiProxy services.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-197CWE-787

Affected Products

Fortinet Inc.
commercial·USaka fortinet
FortiProxy
Security Products
FortiOS
Security Products
FortiOS-6K7K
Security Products
Fortinet
commercial·USaka forti net
FortiOS
Security Products
FortiProxy
Security Products
and 2 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Dec 13, 2022
Remediation due:Jan 3, 2023
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://fortiguard.com/psirt/FG-IR-22-398
fortiguard.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-42475
cisa.gov
https://cert-portal.siemens.com/productcert/csaf/ssa-770770.json
cert-portal.siemens.com
and 87 more references View all →
News mentions
3

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