CVE-2011-2882: Citrix Access Gateway

High severity, CVSS 9.3. EPSS: 56.4% chance of exploitation in the next 30 days.

Stack-based buffer overflow in the NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 allows remote attackers to execute arbitrary code via crafted HTTP header data.

Affected products

• Citrix Access Gateway: version 8.1 only; version 9.0 only; version 9.1 only

Published 2011-07-21. Last modified 2026-06-16.