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Vulnerability record · CVE-2007-2850 · published 24 May 2007

CVE-2007-2850: Citrix access essentials vulnerability

Citrix · Access Essentials

The Session Reliability Service (XTE) in Citrix MetaFrame Presentation Server 3.0, Presentation Server 4.0, and Access Essentials 1.0 and 1.5, allows remote attackers to bypass network security policies and connect to arbitrary TCP ports via a modified address:port string.

10.0 CVSS 2.0 High EPSS 2.8% · top 14.0%
10.0CVSS 2.0 base score
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

The Session Reliability Service (XTE) in Citrix MetaFrame Presentation Server 3.0, Presentation Server 4.0, and Access Essentials 1.0 and 1.5, allows remote attackers to bypass network security policies and connect to arbitrary TCP ports via a modified address:port string.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://fortconsult.net/files/fortconsult.dk/citrix_advisory.pdf
http://secunia.com/advisories/25371 PatchVendor Advisory
http://support.citrix.com/article/CTX112964
http://www.securitytracker.com/id?1018098
http://www.vupen.com/english/advisories/2007/1918
https://exchange.xforce.ibmcloud.com/vulnerabilities/34448
http://fortconsult.net/files/fortconsult.dk/citrix_advisory.pdf
http://secunia.com/advisories/25371 PatchVendor Advisory
http://support.citrix.com/article/CTX112964
http://www.securitytracker.com/id?1018098
http://www.vupen.com/english/advisories/2007/1918
https://exchange.xforce.ibmcloud.com/vulnerabilities/34448

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2008-0356Citrix Presentation Server IMA Service Buffer OverflowThe Independent Management Architecture (IMA) service in Citrix Presentation Server 4.5 and earlier, Access Essentials 2.0 and earlier, and Desktop S…EPSS 73%analysed10.0CVE-2000-0244Citrix metaframe vulnerabilityThe Citrix ICA (Independent Computing Architecture) protocol uses weak encryption (XOR) for user authentication.EPSS 2.3%7.5CVE-2006-5821Citrix metaframe vulnerabilityHeap-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 …EPSS 5.2%7.5CVE-2005-3134Citrix metaframe vulnerabilityCitrix Metaframe Presentation Server 3.0 and 4.0 allows remote attackers to bypass policy restrictions by downloading the launch.ica file and changin…EPSS 2.1%7.5CVE-2001-0908Citrix metaframe vulnerabilityCITRIX Metaframe 1.8 logs the Client Address (IP address) that is provided by the client instead of obtaining it from the packet headers, which allow…EPSS 1.4%7.2CVE-2007-0444Citrix metaframe memory buffer overflow vulnerabilityStack-based buffer overflow in the print provider library (cpprov.dll) in Citrix Presentation Server 4.0, MetaFrame Presentation Server 3.0, and Meta…EPSS 14%6.8CVE-2008-4676Citrix access essentials permissions and access controls vulnerabilityUnspecified vulnerability in Citrix XenApp (formerly Presentation Server) 4.5 Feature Pack 1 and earlier, Presentation Server 4.0, and Access Essenti…EPSS 0.29%6.5CVE-2008-2300Citrix access essentials permissions and access controls vulnerabilityUnspecified vulnerability in Citrix Presentation Server 4.5 and earlier, Citrix Access Essentials 2.0 and earlier, and Citrix Desktop Server 1.0 allo…EPSS 1.4%

Source: NIST National Vulnerability Database (record CVE-2007-2850), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.