CVE-2006-5821
CVE-2006-5821 is a high-severity vulnerability in Citrix Metaframe with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 7.5)
- EPSS exploit prediction: 5% (91st percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Citrix Metaframe
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2006-5821?
- CVE-2006-5821 has a CVSS 2.0 base score of 7.5, rated high severity.
- Is CVE-2006-5821 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2006-5821?
- CVE-2006-5821 primarily affects Citrix Metaframe. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2006-5821?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2006-5821 published?
- CVE-2006-5821 was published on 2006-11-10 and last updated on 2026-06-16.
References
- http://secunia.com/advisories/22802
- http://securitytracker.com/id?1017205
- http://support.citrix.com/article/CTX111186
- http://www.securityfocus.com/archive/1/451337/100/100/threaded
- http://www.securityfocus.com/bid/20986
- http://www.vupen.com/english/advisories/2006/4429
- http://www.zerodayinitiative.com/advisories/ZDI-06-038.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/30148
Affected products (5)
- cpe:2.3:a:citrix:metaframe:1.0:*:windows_2000:*:*:*:*:*
- cpe:2.3:a:citrix:metaframe:3.0:*:microsoft_windows_2000:*:*:*:*:*
- cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:64-bit:*:*:*:*:*
- cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:microsoft_windows_2000:*:*:*:*:*
- cpe:2.3:a:citrix:metaframe_presentation_server:4.0:*:microsoft_windows_2003:*:*:*:*:*
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