CVE-2006-5821: Citrix Metaframe

High severity, CVSS 7.5. EPSS: 5.2% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the IMA_SECURE_DecryptData1 function in ImaSystem.dll for Citrix MetaFrame XP 1.0 and 2.0, and Presentation Server 3.0 and 4.0, allows remote attackers to execute arbitrary code via requests to the Independent Management Architecture (IMA) service (ImaSrv.exe) with invalid size values that trigger the overflow during decryption.

Affected products

• Citrix Metaframe: version 1.0 only; version 3.0 only
• Citrix Metaframe Presentation Server: version 4.0 only

Published 2006-11-10. Last modified 2026-06-16.