CVE-2023-4966
CRITICAL severity · CVSS 9.4 · Memory corruption · actively exploited (CISA KEV)
9.4CVSS CRITICAL exploited ransomware
Actively exploited in the wild (CISA Known Exploited Vulnerabilities).
Known use in ransomware campaigns. Added to KEV 2023-10-18. US federal agencies must patch by 2023-11-08.
Summary
Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactLow
Exploit probability (EPSS)100%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Affected products we track (1)
Recommendation
This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.