CVE-2023-4966
CISA KEVPublished October 18, 2023 · Updated April 3, 2026
high
Official Description+
Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
Affected Products
| Vendor | Product |
|---|---|
| Citrix | NetScaler ADC and NetScaler Gateway |
Patch Status
Patch by 2023-11-08
Recommended Actions
- Check if your systems use any of the affected products listed above.
- Apply vendor patches immediately if available.
- This vulnerability is in CISA's Known Exploited Vulnerabilities catalog — prioritize remediation.
- Monitor vendor advisories for updates and additional mitigations.
- Review logs for indicators of compromise related to CVE-2023-4966.