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CRITICAL · CVSS 9.8 CISA Known Exploited Vulnerability

CVE-2021-44529

Ivanti Endpoint Manager Cloud Service Appliance (EPM CSA) Code Injection Vulnerability

Ivanti Endpoint Manager Cloud Service Appliance (EPM CSA)

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

CVSS
9.8
CRITICAL
EPSS
99.1%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
8 Dec 2021
CWE-94

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 25 March 2024. US federal agencies were required to remediate it by 15 April 2024. CISA records this vulnerability as known to be used in ransomware campaigns.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 99.1%, which is higher than 99.9% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently asked questions

Is CVE-2021-44529 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2021-44529.

What does CVE-2021-44529 affect?

CVE-2021-44529 affects Ivanti Endpoint Manager Cloud Service Appliance (EPM CSA). A code injection vulnerability in the Ivanti EPM Cloud Services Appliance (CSA) allows an unauthenticated user to execute arbitrary code with limited permissions (nobody).

How severe is CVE-2021-44529?

CVE-2021-44529 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 99.1%, higher than 99.9% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 15 April 2024.

How should organisations respond to CVE-2021-44529?

Apply the vendor patch for Ivanti Endpoint Manager Cloud Service Appliance (EPM CSA) as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.