CVE-2021-22928

A vulnerability has been identified in Citrix Virtual Apps and Desktops that could, if exploited, allow a user of a Windows VDA that has either Citrix Profile Management or Citrix Profile Management WMI Plugin installed to escalate their privilege level on that Windows VDA to SYSTEM.

Published: 2021-08-05 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22928 is rated Low Risk (35.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-22928

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.04% 0.05% +0.01%
2 2023-03-07 0.89% 0.04% -0.84%
3 2022-04-01 — 0.89% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22928

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-22928

Affected software / configurations for CVE-2021-22928

Vendor Product Version Raw CPE
citrix virtual_apps_and_desktops >= 2006, <= 2106 cpe:2.3:a:citrix:virtual_apps_and_desktops:*:*:*:*:-:*:*:*
citrix virtual_apps_and_desktops 1912 cpe:2.3:a:citrix:virtual_apps_and_desktops:1912:-:*:*:ltsr:*:*:*
citrix virtual_apps_and_desktops 1912 cpe:2.3:a:citrix:virtual_apps_and_desktops:1912:cu3:*:*:*:*:*:*
citrix xenapp 7.15 cpe:2.3:a:citrix:xenapp:7.15:-:*:*:ltsr:*:*:*
citrix xenapp 7.15 cpe:2.3:a:citrix:xenapp:7.15:cu6:*:*:ltsr:*:*:*
citrix xenapp 7.15 cpe:2.3:a:citrix:xenapp:7.15:cu7:*:*:ltsr:*:*:*
citrix xendesktop 7.15 cpe:2.3:a:citrix:xendesktop:7.15:-:*:*:ltsr:*:*:*
citrix xendesktop 7.15 cpe:2.3:a:citrix:xendesktop:7.15:cu6:*:*:ltsr:*:*:*
citrix xendesktop 7.15 cpe:2.3:a:citrix:xendesktop:7.15:cu7:*:*:ltsr:*:*:*

References for CVE-2021-22928

URL Tags
https://support.citrix.com/article/CTX319750 Patch Vendor Advisory
cvelogic Threat Intelligence