An unprivileged Windows user on the VDA or an SMB user can perform arbitrary command execution as SYSTEM in CVAD versions before 2009, 1912…

published 2020-11-16 5y ago modified 2026-06-17 4mo ago also EUVD-2020-29138

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

An unprivileged Windows user on the VDA or an SMB user can perform arbitrary command execution as SYSTEM in CVAD versions before 2009, 1912 LTSR CU1 hotfixes CTX285871 and CTX285872, 7.15 LTSR CU6 hotfix CTX285341 and CTX285342

Patch / fix

links 1

support.citrix.com/article/CTX285059 advisory

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Exploit prediction

3.48% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

n/a Citrix Virtual Apps and Desktops

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

Technology feeds

Citrix rss critical rss

References

support.citrix.com /article/CTX285059
patch, vendor-advisory

Sources

CVE List CVE-2020-8270
NVD CVE-2020-8270

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