CVE-2019-11634VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2019-11634: Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability

Affects Citrix Workspace Application and Receiver for WindowsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
Ransomware: Used in ransomware campaigns
EPSS: 8.1% chance of exploitation in 30 days – higher than 94% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-11634 (opens in a new tab)

Description

CVE-2019-11634 is a remote code execution vulnerability in Citrix Workspace Application and Receiver for Windows. It arises because local drive access preferences are not properly enforced, allowing unauthorized access to client local drives. This vulnerability has been exploited in the wild and is associated with known ransomware campaigns. The severity is high due to the potential for remote code execution on affected systems.

Summary

Citrix Workspace Application and Receiver for Windows contains a remote code execution vulnerability identified as CVE-2019-11634. The flaw results from improper enforcement of local drive access preferences, which allows attackers to execute code remotely by accessing the clients' local drives. This vulnerability has been observed in active exploitation scenarios, including ransomware campaigns.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected systems by bypassing local drive access restrictions. This can lead to full system compromise, data loss, or deployment of ransomware, as evidenced by known in-the-wild exploitation and ransomware campaign usage.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to vulnerable Citrix Workspace Application and Receiver for Windows installations and monitor for suspicious activity related to local drive access.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:27:10 UTC

References

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