Disclosure summary
Citrix NetScaler ADC and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow for remote code execution or denial of service
CISA remediation guidance
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 discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Unit42 · RSS-d7aa8b8a14faa83f77f40a7136a3526ebc5
Open original source · Updated Sep 30, 2026
Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild (Updated September 30)
CVE mention in publisher metadata; check the original affected versions.
Threat Intelligence · RSS-8ae589a85d811f9a6a426cdd6cf9772d672
Open original source · Updated Sep 29, 2026
Defending Against Active Exploitation of Citrix NetScaler ADC and Gateway Appliances
CVE mention in publisher metadata; check the original affected versions.
Rapid7 Blog · RSS-da058a8af1e1ed31413b2a399e274c2c9eb
Open original source · Updated Sep 28, 2026
Zero-Day Exploitation of Citrix NetScaler ADC and Gateway: CVE-2026-88771 and CVE-2026-88772
CVE mention in publisher metadata; check the original affected versions.
Original records & references
PUBLISHED 2026-09-27T00:00:00-04:00
MODIFIED 2026-09-27T00:00:00-04:00
INGESTED 2026-10-06T11:42:57-04:00