Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 10/07/2025. Patch affected systems as an emergency. It is known to be used in ransomware campaigns.
| Package | Affected versions | Patched versions |
|---|---|---|
| netscaler application delivery controller | ≥ 12.1, < 12.1-55.328≥ 13.1, < 13.1-37.235≥ 13.1, < 13.1-58.32≥ 14.1, < 14.1-43.56 | 12.1-55.32813.1-37.23513.1-58.3214.1-43.56 |
| netscaler gateway | ≥ 13.1, < 13.1-58.32≥ 14.1, < 14.1-43.56 | 13.1-58.3214.1-43.56 |
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
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