Actively exploited in the wild
Citrix NetScaler Out-of-Bounds Read Vulnerability
Citrix - NetScaler · Listed in the CISA KEV since 2026-03-30. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2026-3055
CriticalCVSS 9.8KEVSummary
Niewystarczająca walidacja danych wejściowych w NetScaler ADC i NetScaler Gateway, gdy są skonfigurowane jako SAML IDP, prowadzi do nadmiernego odczytu pamięci.
Risk Assessment
Organizacja może być narażona na wyciek wrażliwych danych z pamięci, co może prowadzić do poważnych naruszeń bezpieczeństwa.
Recommendation
Zaleca się aktualizację oprogramowania do najnowszej wersji oraz wdrożenie dodatkowych mechanizmów walidacji danych wejściowych.
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Original NVD description (English source)
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

