What is CVE-2021-44520?

CVE-2021-44520 is a high-severity vulnerability in Citrix Xenmobile Server, classified under Command Injection. CVSS score: 8.8/10. Published 2022-04-13.

How severe is CVE-2021-44520?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Citrix Xenmobile Server

CVE-2021-44520

In Citrix XenMobile Server through 10.12 RP9, there is an Authenticated Command Injection vulnerability, leading to remote code execution with root privileges.

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-04-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.057 (92.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.059 · newest: 0.057 · change: -0.002

Affected products

Citrix Xenmobile Server — versions 10.13.0, 10.14.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

docs.citrix.com/en-us/xenmobile/server/document-history.html (Vendor Advisory)
gist.github.com/tree-chtsec/766f81e22ae383987d75eedb3b23b709 (Third Party Advisory)
support.citrix.com/article/CTX370551 (Vendor Advisory)
www.chtsecurity.com/news/09be10ae-b50e-46c9-8ce7-2e995fd988fe

Frequently asked questions

What is CVE-2021-44520?: CVE-2021-44520 is a high-severity vulnerability in Citrix Xenmobile Server, classified under Command Injection. CVSS score: 8.8/10. Published 2022-04-13.
How severe is CVE-2021-44520?: High severity. CVSS v3 base score is 8.8 out of 10.