Citrix Systems Secure Access Client for Windows: Mehrere Schwachstellen
WID-SEC-2026-2339 · first 15.07.2026 · updated 15.07.2026 · CVSS 7,8
What it is about
Der Citrix Secure Access Client ist eine Softwareanwendung, die einen sicheren Fernzugriff auf virtuelle Citrix-Apps und -Desktops ermöglicht, so dass Benutzer von jedem Gerät oder Standort aus auf ihre virtualisierten Anwendungen und Desktops zugreifen können. Ein lokaler Angreifer kann mehrere Schwachstellen in Citrix Systems Secure Access Client for Windows ausnutzen, um seine Privilegien zu erhöhen und Informationen offenzulegen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- seine Privilegien zu erhöhen
- Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Citrix Systems Secure Access Client for Windows <26.6.1.20
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Citrix Systems Secure Access Client for Windows 26.6.1.20
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Citrix Security Advisory vom 2026-07-14 support.citrix.com
- EUVD Security Advisory vom 2026-07-14 euvd.enisa.europa.eu
CVE: CVE-2026-53565, CVE-2026-53566
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.