Disclosure summary
Citrix NetScaler ADC and NetScaler Gateway contain an improper input validation vulnerability that could allow an unauthenticated attacker to execute arbitrary commands.
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