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CVEs with exploitation confirmed by CISA (Known Exploited Vulnerabilities), with required actions and deadlines.

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CVE-2026-88779 High · 7.5 KEV High · 51 CWE-119 Oct 4, 2026
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
CVE-2026-19490 Critical · 9.8 KEV High · 69 Public exploit CWE-288 Aug 19, 2026
Citrix NetScaler Authentication Bypass Using an Alternate Path or Channel Vulnerability
Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: from 14.1 through 73.32 and from 13.1 through 63.21; Gateway: from 14.1 through 73.32 and from 13.1 through 63.21.
CVE-2026-8452 Critical · 9.8 KEV High · 63 Public exploit CWE-119 Jun 30, 2026
Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server
CVE-2026-3055 Critical · 9.8 KEV Urgent · 82 Public exploit CWE-125 Mar 23, 2026
Citrix NetScaler Out-of-Bounds Read Vulnerability
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
CVE-2025-7775 Critical · 9.8 KEV High · 66 Public exploit CWE-119 Aug 26, 2025
Citrix NetScaler Memory Overflow Vulnerability
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX
CVE-2025-6543 Critical · 9.8 KEV High · 65 Public exploit CWE-119 Jun 25, 2025
Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CVE-2025-5777 High · 7.5 KEV Urgent · 87 Public exploit Ransomware CWE-908 Jun 17, 2025
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server