All vulnerabilities
CVE-2026-84420

Citrix Workspace app for Windows: Out-of-Bounds Write and Out-of-Bounds Read

Citirx Citrix Workspace app for WindowsNetwork & edge
Open in ThreatlineRecord JSON
CVSS
5.8Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.09%Chance of exploitation activity in the next 30 days, higher than 0% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2603.20 CRFixed versionCVE List
Published13 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

  • 2603.20 CRCitrix Workspace app for WindowsCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Out-of-bounds read vulnerability in Citirx Citrix Workspace app for Windows.

This issue affects Citrix Workspace app for Windows: before 2603.20 CR, before LTSR 2607, and before LTSR 2507 CU3.

Text from CVE List

Affected versions 3

  • Citrix Workspace app for Windowsaffected: all versions before 2603.20 CRCVE List
  • Citrix Workspace app for Windowsaffected: all versions before LTSR 2607CVE List
  • Citrix Workspace app for Windowsaffected: all versions before LTSR 2507 CU3CVE List

References 1