CitrixCVE-2026-78547

Citrix Workspace app for Windows: out-of-bounds write

CVE-2026-78547 · Published Sep 11, 2026 · updated Sep 16, 2026

Medium4.4

Fix: upgrade to 2603.11 Current Release (CR) or later (3 fixed versions below)

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

This issue affects Citrix Workspace app for Windows: before 2603.11 Current Release (CR), before 2507.1 LTSR CU3, and before LTSR 2607.

Affected versions

Package	Affected	Fixed in
Citrix Workspace app for Windows Product	< 2603.11 Current Release (CR)	2603.11 Current Release (CR)
	< 2507.1 LTSR CU3	2507.1 LTSR CU3
	< LTSR 2607	LTSR 2607

Details and references

CVSS 4.0: CVSS:4.0/AV:P/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-787