{"id":"CVE-2011-2593","aliases":["EUVD-2011-2576","GHSA-fxxh-pp9v-6qr6"],"status":"published","title":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix...","description":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03986,"percentile":0.90571,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-189"],"published":"2014-08-12T20:00:00Z","modified":"2026-06-16T23:31:36Z","products":[{"vendor":"citrix","product":"access_gateway_plug-in"}],"references":[{"url":"http://secunia.com/advisories/45299","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://secunia.com/secunia_research/2012-26","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://support.citrix.com/article/CTX134303","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/77317","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-2593"},{"url":"https://github.com/advisories/GHSA-fxxh-pp9v-6qr6"}],"sources":{"cve":[{"id":"CVE-2011-2593","description":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.","status":"published","published":"2014-08-12T20:00:00Z","modified":"2024-08-06T23:08:23.362Z","updated_at":"2026-11-02T14:35:36.252742Z"}],"euvd":[{"id":"EUVD-2011-2576","description":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.","status":"published","published":"2014-08-12T20:00:00Z","modified":"2024-08-06T23:08:23Z","updated_at":"2026-11-03T01:39:55.11051Z"}],"ghsa":[{"id":"GHSA-fxxh-pp9v-6qr6","title":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix...","description":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.","status":"published","published":"2022-05-17T01:54:54Z","modified":"2023-02-03T05:06:10Z","updated_at":"2026-11-02T14:53:51.237254Z"}],"nvd":[{"id":"CVE-2011-2593","description":"Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway Enterprise Edition Plug-in for Windows 9.x before 9.3-57.5 and 10.0 before 10.0-69.4 allows remote attackers to execute arbitrary code via a crafted Content-Length HTTP header, which triggers a heap-based buffer overflow.","status":"published","published":"2014-08-12T20:55:02.527Z","modified":"2026-06-16T23:31:36.91Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-189"],"updated_at":"2026-11-02T14:02:12.639283Z"}]}}