Vulnerability in Citrix Receiver
CVE-2019-11634
Citrix Workspace App before 1904 for Windows has Incorrect Access Control.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.081 (94.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.080 · newest: 0.081 · change: +0.001
Affected products
- Citrix Receiver — versions 4.9
- Citrix Workspace
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- support.citrix.com/v1/search (Vendor Advisory)
- support.citrix.com/article/CTX251986 (Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2019-11634?
- CVE-2019-11634 is a critical-severity vulnerability in Citrix Receiver, classified under Improper Access Control. CVSS score: 9.8/10. Published 2019-05-22.
- How severe is CVE-2019-11634?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-11634 known to be exploited?
- Yes. CVE-2019-11634 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.