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Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild

Two Citrix NetScaler zero-days (CVE-2026-88771, CVE-2026-88772) are being exploited in the wild, giving attackers unauthenticated access to perimeter infrastructure—patch or isolate affected appliances without delay.

Summary written by editorial AI · Source link below

Filed by Unit 42 (Palo Alto)1 min readCVE-2026-88771Read at source ↗
CVSS9.8criticalCVE-2026-88771+1 more

Unit 42 is aware of possible 0-day activity against NetScaler devices. Citrix reports CVE-2026-88771, CVE-2026-88772 have been exploited in the wild. The post Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild appeared first on Unit 42 .

Editorial Analysis

Why it matters

NetScaler appliances guard network perimeters across European enterprises; active zero-day exploitation means unpatched devices are likely already targeted.

What to do

Immediately apply Citrix-provided patches or workarounds and conduct forensic review of all NetScaler appliances for compromise indicators.

Board brief

Two actively exploited zero-day vulnerabilities in Citrix NetScaler require immediate patching to prevent perimeter breach.

Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.

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Read the full report at Unit 42 (Palo Alto)

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