What is CVE-2021-44529?

CVE-2021-44529 is a critical-severity vulnerability in Ivanti Endpoint Manager Cloud Services Appliance, classified under Code Injection. CVSS score: 9.8/10. Published 2021-12-08.

How severe is CVE-2021-44529?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-44529 known to be exploited?

Yes. CVE-2021-44529 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-03-25), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.

RCE in Ivanti Endpoint Manager Cloud Services Appliance

CVE-2021-44529

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

Vulnerability class: RCE (Remote Code Execution)

Published 2021-12-08 · last modified 2026-08-04.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.991 (99.9th percentile), scored 2026-10-17.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.991 · newest: 0.991 · change: 0.000

Affected products

Ivanti Endpoint Manager Cloud Services Appliance — versions 4.6
Ivanti Epm — versions 4.6.0-512

Weakness classification (CWE)

CWE-94 — Code Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2024-03-25. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2024-04-15.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

forums.ivanti.com/s/article/SA-2021-12-02 (Patch, Mitigation, Vendor Advisory)
packetstormsecurity.com/files/166383/Ivanti-Endpoint-Manager-CSA-4.5-4.6-Remote… (Exploit, VDB Entry, Third Party Advisory)
packetstormsecurity.com/files/170590/Ivanti-Cloud-Services-Appliance-CSA-Comman… (Exploit, VDB Entry, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-44529?: CVE-2021-44529 is a critical-severity vulnerability in Ivanti Endpoint Manager Cloud Services Appliance, classified under Code Injection. CVSS score: 9.8/10. Published 2021-12-08.
How severe is CVE-2021-44529?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-44529 known to be exploited?: Yes. CVE-2021-44529 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-03-25), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.