# CVE-2021-44529: Ivanti EPM - RCE

> Live exploitation tracking for CVE-2021-44529 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-2021-44529

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** Ivanti Cloud Services Appliance
- **Weaknesses:** CWE-94 (Improper Control of Generation of Code ('Code Injection'))
- **Tags:** enterprise_software, firewall

## Description

A code injection vulnerability in the Ivanti EPM Cloud Services Appliance (CSA) allows an unauthenticated user to execute arbitrary code with limited permissions (nobody).

## CrowdSec analysis

[CVE-2021-44529](https://euvd.enisa.europa.eu/vulnerability/CVE-2021-44529) is a critical code injection vulnerability affecting the Ivanti EPM Cloud Services Appliance. This flaw allows unauthenticated attackers to execute arbitrary code on the target system with limited permissions.

CrowdSec has been tracking this vulnerability and its exploits since 5th of March 2025.

CrowdSec network data shows that most actors exploiting CVE-2021-44529 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2021-44529 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2021-44529 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Exploitation attempts are typically directed at URLs containing `/client/index.php`.

## Timeline

- 2021-12-08: CVE Published. CVE-2021-44529 is published to NVD.
- 2024-03-25: CISA KEV. CVE-2021-44529 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2024-04-15: 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).
- 2025-03-05: Rule Released. CrowdSec releases a rule to detect CVE-2021-44529 exploitation attempts against the CrowdSec Network.
- 2025-03-06: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2021-44529 for the first time.

## References

- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-44529.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2021-44529) follows observed exploitation activity for CVE-2021-44529. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.