CVE-2023-6549
High 7.5 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
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
Metrics
- CVSS 3.1
-
7.5 (HIGH)
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 58% (percentile: 99) as of 2 November 2026
- CWE
- CWE-119
Affected products
citrix: netscaler application delivery controller; citrix: netscaler gateway