What is the CVSS score of CVE-2019-11634?

CVE-2019-11634 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 8.1%.

Is CVE-2019-11634 being actively exploited?

Yes, CVE-2019-11634 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

Receiver CVE-2019-11634

CRITICAL

Improper Access Control (CWE-284)

2019-05-22 cve@mitre.org

Authentication Bypass Citrix Microsoft Receiver Workspace

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

May 22, 2019 - 17:29 nvd

CRITICAL 9.8

DescriptionNVD

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

AnalysisAI

Citrix Workspace App before 1904 for Windows has Incorrect Access Control. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-284. Citrix Workspace App before 1904 for Windows has Incorrect Access Control. Affected products include: Citrix Receiver, Citrix Workspace. Version information: before 1904.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.