Memory Overflow Vulnerability in Citrix NetScaler ADC and Gateway
CVE-2026-120864

9.3CRITICAL

Key Information:

Vendor

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

What is CVE-2026-120864?

A memory overflow vulnerability has been identified in the ICA proxy component of Citrix NetScaler ADC and Gateway. This flaw can lead to unpredictable behavior or system outages, impacting the availability and reliability of the affected services. It is crucial for organizations using these products to assess their security posture and implement necessary mitigations to safeguard against potential disruptions.

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:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
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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