Vulnerability Intelligence Report
Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
CVE-2023-6549
Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
8.2
HIGH
Exploitability:3.9
Impact Score:4.3
EPSS Probability:57.63%
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 |
|---|---|---|
| Cloud Software Group | NetScaler ADC | 14.1 < 12.35 (affected), 13.1 < 51.15 (affected), 13.0 < 92.21 (affected), 13.1-FIPS < 37.176 (affected), 12.1-FIPS < 55.302 (affected), 12.1-NDcPP < 55.302 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
57.633%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Citrix Systems, Inc. · Vendor · USA |
| Reserved | 2023-12-06T11:01:58 |
| Published | 2024-01-17T20:15:53 |
| Last Updated | 2025-10-21T23:05:27 |
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