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CVE-2022-42475

98
FAUCET Score

CVE-2022-42475 is a critical heap-based buffer overflow vulnerability affecting FortiOS SSL-VPN and FortiProxy SSL-VPN products across multiple versions. This flaw allows a remote, unauthenticated attacker to execute arbitrary code or commands through specially crafted requests. With a CVSS score of 9.8, it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. The vulnerability is actively exploited in the wild, including in known ransomware campaigns, and has garnered significant community attention with numerous discussions and media coverage, though public Metasploit or ExploitDB modules are not yet available.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.0, <= 5.0.14CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 5.2.0, <= 5.2.15CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 5.4.0, <= 5.4.13CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 5.6.0, <= 5.6.14CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.0.16CPE matchmatch criteria
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.47%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Dec 13, 2022
Nuclei: CVE-2022-42475 · May 26, 2025
This CVE's current EPSS score of 0.9947 is in the 100th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

fortinetworkaround availablevia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
fortiguard.com / psirt/FG-IR-22-398
ExploitMitigationVendor Advisory