Memory Overflow in Citrix NetScaler Affects Geolocation and GSLB Functionality
CVE-2026-120861

8.7HIGH

Key Information:

Vendor

Citrix
Status
Netscaler Adc
Netscaler Gateway
Vendor
CVE Published:
13 November 2026

What is CVE-2026-120861?

A memory overflow vulnerability has been identified in Citrix NetScaler, specifically affecting the Global Server Load Balancing (GSLB) and geolocation components. This vulnerability arises from improper handling during geolocation processes, particularly when utilizing methods such as MEP, static-proximity, and configuration synchronization. Exploitation of this vulnerability could result in unpredictable behavior and may lead to a Denial of Service, impacting the availability and reliability of services. It is essential for users of Citrix NetScaler to review their configurations and apply necessary updates to mitigate potential risks associated with this vulnerability.

Affected Version(s)

NetScaler ADC 0 < 14.1-73.57

NetScaler ADC 0 < 13.1-64.39

NetScaler ADC 0 < 14.1-73.58 FIPS

References

https://support.citrix.com/support-home/kbsearch/article?...

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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