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Servers and applications

CVE-2026-88779

Vulnerability in NetScaler ADC and NetScaler Gateway. This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 4 Oct 2026.

Severity
High 8.7
Published
4 Oct 2026
Last changed
5 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
13.1-37.282, 13.1-64.28, 14.1-73.41
Sources
NVD

Affected software

SoftwareAffected versions
NetScaler ADC and GatewayServers and applications · cpe:a:citrix:netscaler_application_delivery_controller
  • From 13.1 before 13.1-37.282
  • From 13.1 before 13.1-64.28
  • From 14.1 before 14.1-73.41
  • From 14.1-66.68 up to 14.1-73.41
NetScaler ADC and GatewayServers and applications · cpe:a:citrix:netscaler_gateway
  • From 13.1 before 13.1-64.28
  • From 14.1 before 14.1-73.41

Known exploited

CISA name
Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or…
Due for US agencies
7 Oct 2026
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-88779
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-88779