CVE-2019-11634: Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability
CVSS: 9.8v3.1CriticalKEVRansomwareAnalyzed
Published 22-05-2019Last modified 12-08-2026
Vulnerability summary
CVE-2019-11634 is a critical (CVSS 9.8) Improper Access Control vulnerability in Citrix Workspace Application and Receiver for Windows. It is known to be exploited: CISA lists it, first on 03-11-2021. It has been used in ransomware campaigns. EPSS estimates a 8.09% chance of exploitation in the next 30 days, higher than 94.7% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
8.09%
0%100%
Low · +0.06 pp in 30 daysKEVListedCISA
RansomwareKnown useFlagged by CISA
Public exploits0No public exploits recorded
Timeline
- 22-05-2019PublishedVulnerability first disclosed.
- 03-11-2021Added to CISA KEVCitrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability
- 03-05-2022CISA remediation dueApply updates per vendor instructions.
- 12-08-2026Last modifiedVulnerability information updated.
Description
Citrix Workspace App before 1904 for Windows has Incorrect Access Control.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
8.09%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
+0.06 pp
From 8.03% on 19-09-2026
19-09-202619-10-2026
EPSS score8.09%
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-11-2021
- Federal due date
- 03-05-2022
Ransomware
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2019-11634
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
1 vendor · 2 products
References
3 links- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11634Government ResourceUS Government Resource