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CVE-2024-21762

95
FAUCET Score

CVE-2024-21762 is a critical out-of-bounds write vulnerability affecting multiple versions of Fortinet FortiOS and FortiProxy. This flaw allows unauthenticated attackers to execute arbitrary code or commands remotely through specially crafted requests. With a CVSS score of 9.8 (Critical) and an EPSS score indicating high exploitability, the vulnerability poses a significant risk due to its network-based attack vector, low attack complexity, and complete compromise potential. It is actively exploited in the wild, notably by the Qilin ransomware group, and has garnered extensive community discussion and media coverage, despite no public exploit code being available in Metasploit, Nuclei, or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, < 2.0.14CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.15CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 7.2.0, < 7.2.9CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 7.4.0, < 7.4.3CPE matchmatch criteria
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.0.18CPE 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
84.28%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Feb 9, 2024
This CVE's current EPSS score of 0.8428 is in the 98th percentile among its peer group of 36,862 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)

fortinetvendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
fortiguard.com / psirt/FG-IR-24-015
Vendor Advisory