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CVE-2024-55591

98
FAUCET Score

CVE-2024-55591 is a critical authentication bypass vulnerability affecting FortiOS versions 7.0.0 through 7.0.16 and FortiProxy versions 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12. This flaw allows a remote, unauthenticated attacker to gain super-admin privileges by sending crafted requests to the Node.js websocket module. With a CVSS score of 9.8 (CRITICAL), the vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. It is actively exploited in the wild, including in known ransomware campaigns like Qilin, and has garnered significant community discussion and media coverage, although no public Metasploit or ExploitDB modules are currently available.

Impacted Technologies

VendorProductVersion(s)CPE
>= 7.0.0, < 7.0.20CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 7.2.0, < 7.2.13CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.17CPE 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
98.26%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Added to KEV · Jan 14, 2025
Nuclei: CVE-2024-55591 · Apr 7, 2025
This CVE's current EPSS score of 0.9826 is in the 99th percentile among its peer group of 36,821 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

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
fortiguard.fortinet.com / psirt/FG-IR-24-535
MitigationVendor Advisory