Threat landscape
critical exploited

Citrix Systems NetScaler ADC und Gateway: Mehrere Schwachstellen

WID-SEC-2026-2147 · first 01.07.2026 · updated 27.08.2026 · CVSS 9,9

×

What it is about

Citrix NetScaler ist eine integrierte Lösung für die Beschleunigung, das Traffic Management und die Sicherheit von Web-Applikationen. Citrix Access Gateway ist ein universell einsetzbares SSL-VPN. Advanced Access Control (AAC) ermöglichen es Administratoren, Zugriffsregeln für das Access Gateway festzulegen. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Citrix Systems NetScaler ADC und Gateway ausnutzen, um Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder andere, nicht näher spezifizierte Auswirkungen auszulösen.

Under what conditions?

Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.

What can happen in the worst case

An attacker could use the vulnerability to

  • Informationen offenzulegen
  • einen Denial-of-Service-Zustand zu verursachen oder andere, nicht näher spezifizierte Auswirkungen auszulösen

Am I affected?

Affected according to the BSI:

  • Citrix Systems NetScaler ADC <14.1-72.61
  • Citrix Systems NetScaler ADC <13.1-63.18
  • Citrix Systems NetScaler ADC <14.1-72.61 FIPS
  • Citrix Systems NetScaler ADC <13.1-FIPS 13.1.37.272
  • Citrix Systems NetScaler ADC <13.1-NDcPP 13.1.37.272
  • Citrix Systems NetScaler Gateway <14.1-72.61
  • Citrix Systems NetScaler Gateway <13.1-63.18

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

  • Citrix Systems NetScaler ADC 14.1-72.61
  • Citrix Systems NetScaler ADC 13.1-63.18
  • Citrix Systems NetScaler ADC 14.1-72.61 FIPS
  • Citrix Systems NetScaler ADC 13.1-FIPS 13.1.37.272
  • Citrix Systems NetScaler ADC 13.1-NDcPP 13.1.37.272
  • Citrix Systems NetScaler Gateway 14.1-72.61
  • Citrix Systems NetScaler Gateway 13.1-63.18

Is the vulnerability already being exploited?

  • CVE-2026-8452: exploited in the wild according to CISA, in the catalogue since 26.08.2026.

Information and sources

CVE: CVE-2026-10816, CVE-2026-10817, CVE-2026-13474, CVE-2026-8451, CVE-2026-8452, CVE-2026-8655

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.

Set up in an hour, trained in a week.

Create a free account, add your team, unlock the course. You only pay when you start. Would you rather see what a test email looks like first? The self-test is free.

Add your team Test it yourself first