Vulnerability Intelligence Report
Unauthenticated sensitive information disclosure
CVE-2023-4966
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
Memory Corruption
CVSS Base Score
9.4
CRITICAL
Exploitability:3.9
Impact Score:5.5
EPSS Probability:100.00%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-119 ↗CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Citrix | NetScaler ADC | 14.1 < 8.50 (affected), 13.1 < 49.15 (affected), 13.0 < 92.19 (affected), 13.1-FIPS < 37.164 (affected), 12.1-FIPS < 55.300 (affected), 12.1-NDcPP < 55.300 (affected) |
| Citrix | NetScaler Gateway | 14.1 < 8.50 (affected), 13.1 < 49.15 (affected), 13.0 < 92.19 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.999%
GitHub Advisory
Vulnerability Class
Memory Corruption
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Citrix Systems, Inc. · Vendor · USA |
| Reserved | 2023-09-14T15:51:21 |
| Published | 2023-10-10T13:12:17 |
| Patch Date | 2023-10-10 |
| Last Updated | 2026-07-31T03:55:28 |
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