Vulnerability Intelligence Report
NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread
CVE-2025-5777
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
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.3
CRITICAL
EPSS Probability:99.96%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-125 ↗CWE-125 Out-of-bounds Read
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| NetScaler | ADC | 14.1 < 43.56 (affected), 13.1 < 58.32 (affected) |
| NetScaler | Gateway | 14.1 < 43.56 (affected), 13.1 < 58.32 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.959%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Citrix Systems, Inc. · Vendor · USA |
| Reserved | 2025-06-06T06:14:02 |
| Published | 2025-06-17T12:29:34 |
| Patch Date | 2025-06-17 |
| Last Updated | 2026-08-04T03:55:49 |
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