CVE-2006-5821

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.

Published: 2006-11-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-5821 is rated Moderate Risk (57.7/100): CVSS High severity, with high exploitation likelihood (EPSS 5.15%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-5821

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 9.43% 5.15% -4.28%
2 2025-06-29 9.10% 9.43% +0.33%
3 2025-03-30 — 9.10% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-5821

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2006-5821

OS Trackers for CVE-2006-5821

vendor priority summary link
alpine — CVE-2006-5821: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-5821

Affected software / configurations for CVE-2006-5821

Vendor Product Version Raw CPE
citrix metaframe 1.0 cpe:2.3:a:citrix:metaframe:1.0:*:windows_2000:*:*:*:*:*
citrix metaframe 3.0 cpe:2.3:a:citrix:metaframe:3.0:*:microsoft_windows_2000:*:*:*:*:*
citrix metaframe_presentation_server 4.0 cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:64-bit:*:*:*:*:*
citrix metaframe_presentation_server 4.0 cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:microsoft_windows_2000:*:*:*:*:*
citrix metaframe_presentation_server 4.0 cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:microsoft_windows_2003:*:*:*:*:*

References for CVE-2006-5821

cvelogic Threat Intelligence