# CVE-2024-21762: FortiOS - RCE

> Live exploitation tracking for CVE-2024-21762 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2024-21762

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.6
- **Public exploit available:** Yes
- **Affected products:** Fortinet FortiOS
- **Weaknesses:** CWE-787 (Out-of-bounds Write)
- **Tags:** enterprise_software, firewall

## Description

A out-of-bounds write in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7 allows attacker to execute unauthorized code or commands via specifically crafted requests

## CrowdSec analysis

[CVE-2024-21762](https://euvd.enisa.europa.eu/vulnerability/CVE-2024-21762) is an out-of-bounds write vulnerability affecting multiple versions of Fortinet FortiProxy and FortiOS. This flaw allows attackers to execute unauthorized code or commands on the affected systems by sending specially crafted requests, potentially leading to full system compromise or further attacks within the network.

CrowdSec has been tracking this vulnerability and its exploits since 1st of April 2025.

CrowdSec has not observed any significant exploitation activity targeting CVE-2024-21762 across its network. As a result, no community-driven trend analysis is available for this vulnerability at this time.

Attackers exploit CVE-2024-23113 by sending specially crafted POST requests to the `/remote/vulncheck` endpoint on Fortinet FortiOS SSL VPN interfaces, attempting to trigger a heap buffer underflow vulnerability.

## Timeline

- 2024-02-09: CVE Published. CVE-2024-21762 is published to NVD.
- 2024-02-09: CISA KEV. CVE-2024-21762 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2024-02-16: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2025-04-01: Rule Released. CrowdSec releases a rule to detect CVE-2024-21762 exploitation attempts against the CrowdSec Network.
- 2025-08-17: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2024-21762 for the first time.

## References

- https://github.com/BishopFox/cve-2024-21762-check
- https://www.acunetix.com/vulnerabilities/web/fortinet-out-of-bound-memory-write-rce-cve-2024-21762/

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2024-21762) follows observed exploitation activity for CVE-2024-21762. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.