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CVE-2019-11634

Citrix Workspace Application and Receiver for Windows Remote Code Execution

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 8.09%
  1. Published22 May 2019
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

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.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022Used in ransomware

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Citrix Receiver4.9
Citrix Workspace< 1904

Remediation

Fixed in
Citrix Workspace≥ 1904

References

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Frequently asked

Is CVE-2019-11634 being actively exploited?

Yes. CVE-2019-11634 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.

How severe is CVE-2019-11634?

CVE-2019-11634 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 8.09% probability of exploitation.

Which products are affected by CVE-2019-11634?

Affected products include Citrix Receiver, Citrix Workspace.

How do I fix CVE-2019-11634?

Upgrade affected software to a fixed version, for example Citrix Workspace 1904 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-11634 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.