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CVE-2019-11634

CRITICAL9.8
CISA KEV

Published 2019-05-22 · Updated 2026-08-12 · Source cve@mitre.org

Summary

CVE-2019-11634 is a critical-severity (CVSS 9.8) vulnerability in Citrix Workspace Application and Receiver for Windows. CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by May 3, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Citrix has 27 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.

All 27 known-exploited Citrix vulnerabilities →

Description

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

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-284

CISA Known-Exploited Vulnerability

Product: Citrix — Workspace Application and Receiver for Windows

Name: Citrix Workspace Application and Receiver for Windows Remote Code Execution Vulnerability

Date added: 2021-11-03 · Due: 2022-05-03

USED IN RANSOMWARE

Required action: Apply updates per vendor instructions.

View on NVD