Home/CVE/Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability
CVE

CVE-2019-11634

Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability

Citrix Workspace App before 1904 for Windows has Incorrect Access Control.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.3078 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-284Improper Access Control
▤

Affected Products & Versions

2
citrix receiverall versions
citrix workspace< 1904
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumGoogle Workspace Out Of Domain Email Forwarding
productmediumGoogle Workspace Government Attack Warning
productmediumGoogle Workspace Role Modified or Deleted
productmediumGoogle Workspace Granted Domain API Access
productmediumGoogle Workspace User Granted Admin Privileges
productmediumGoogle Workspace Application Removed
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 May 2019 · 05:29 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisaKEV-CVE-2019-11634
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.citrix.com/article/CTX251986Vendor Advisory
https://support.citrix.com/v1/search?searchQuery=%22%22&lang=en&sort=cr_date_desc&prod=&pver=&ct=Security+BulletinVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11634US Government Resource
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