No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations, limit exposure of affected systems, and watch this record for a patch.
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
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Developments from the last 30 days, newest first.
CVE-2026-88777 scored CVSS 8.8
Basis: NIST National Vulnerability Database
CISA lists this as exploited in the wild. Unpatched NetScaler ADC / Gateway systems are exposed to active attacks now.
Treat this as an emergency.
