{"uuid": "23d522b4-421f-473f-bd96-e694bcd6f44e", "vulnerability": {"vulnId": "CVE-2023-4966", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "23d522b4-421f-473f-bd96-e694bcd6f44e"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2023-10-18T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2023-10-18T00:00:00Z", "recorded_at": "2026-02-02T13:24:01Z", "first_seen_at": "2023-10-18T00:00:00Z"}, "scope": {"notes": "KEV entry: Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability | Affected: Citrix / NetScaler ADC and NetScaler Gateway | 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. | Required action: Apply mitigations and kill all active and persistent sessions per vendor instructions [https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/] OR discontinue use of the product if mitigations are unavailable. | Due date: 2023-11-08 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/, https://support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967 ;  https://nvd.nist.gov/vuln/detail/CVE-2023-4966"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-119"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "NetScaler ADC and NetScaler Gateway", "due_date": "2023-11-08", "date_added": "2023-10-18", "vendorProject": "Citrix", "vulnerabilityName": "Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability", "knownRansomwareCampaignUse": "Known"}}], "references": [{"id": "CVE-2023-4966", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-4966"}]}