CVE-2019-11634
Published: November 3, 2021
Official Description
Citrix Workspace Application and Receiver for Windows contains remote code execution vulnerability resulting from local drive access preferences not being enforced into the clients' local drives.
CISA KEV Advisory
Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability
Citrix Workspace Application and Receiver for Windows contains remote code execution vulnerability resulting from local drive access preferences not being enforced into the clients' local drives.
Apply updates per vendor instructions.
Risk Analysis
This remote code execution vulnerability in Citrix Workspace Application and Receiver for Windows results from local drive access preferences not being enforced. Its presence in the KEV catalog and an EPSS score of 0.31160 indicate a high likelihood of exploitation, making it an urgent concern for Citrix users.
This vulnerability is actively exploited in the wild, as confirmed by its presence in the KEV catalog. Attackers are leveraging this flaw to achieve remote code execution.
Update Citrix Workspace Application and Receiver for Windows to the latest secure versions. Review and enforce local drive access preferences to prevent unauthorized access and remote code execution.
Technical Analysis
CVE-2019-11634 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-11634 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-11634 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1