CVE-2026-88777

Memory overflow vulnerability leading to unpredictable or erroneous behavior or Denial of Service

State: Published
Severity: 8.8 High
Published: Sep 27, 2026
Updated: Sep 29, 2026
Reserved: Sep 10, 2026

Description

Memory overflow vulnerability vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway.

This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to unpredictable or erroneous behavior or Denial of Service

Scores

CVSS	Score	Vector	Source
4.0	8.8 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N	NetScaler

Weaknesses

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

Affected Products

Product	Versions
ADCCitrix NetScaler	before 14.1-73.37Affected before 13.1-64.23Affected before 14.1-73.37 FIPSAffected before 13.1.37.279 FIPS and NDcPPAffected
GatewayCitrix NetScaler	before 14.1-73.37Affected before 13.1-64.23Affected

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.