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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-22928

25
FAUCET Score

CVE-2021-22928 is a local privilege escalation vulnerability affecting Citrix Virtual Apps and Desktops, XenApp, and XenDesktop. An authenticated user on a Windows Virtual Delivery Agent (VDA) with Citrix Profile Management or WMI Plugin installed can escalate their privileges to SYSTEM. This high-severity flaw (CVSS 7.8) has a low attack complexity and no user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant media coverage, though it has received some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2006, <= 2106CPE matchmatch criteria
cpe:2.3:a:citrix:virtual_apps_and_desktops:*:*:*:*:-:*:*:*
1912CPE matchmatch criteria
cpe:2.3:a:citrix:virtual_apps_and_desktops:1912:-:*:*:ltsr:*:*:*
1912CPE matchmatch criteria
cpe:2.3:a:citrix:virtual_apps_and_desktops:1912:cu3:*:*:*:*:*:*
7.15CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:7.15:-:*:*:ltsr:*:*:*
7.15CPE matchmatch criteria
cpe:2.3:a:citrix:xenapp:7.15:cu6:*:*:ltsr:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.25%
Probability of exploitation in next 30 days
EPSS Percentile
16.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0025 is in the 50th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

citrixpatch availablevia nvd_reference
View patch

References

support.citrix.com / article/CTX319750
PatchVendor Advisory