CVE-2011-2593
CVE-2011-2593 is a medium-severity vulnerability in Citrix Access Gateway Plug-in with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.
Key facts
- Severity: Medium (CVSS 2.0 base score 6.8)
- EPSS exploit prediction: 4% (89th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-189
- Affected product: Citrix Access Gateway Plug-in
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2011-2593?
- 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.
- How severe is CVE-2011-2593?
- CVE-2011-2593 has a CVSS 2.0 base score of 6.8, rated medium severity.
- Is CVE-2011-2593 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-2593?
- CVE-2011-2593 primarily affects Citrix Access Gateway Plug-in. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-2593?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2011-2593 published?
- CVE-2011-2593 was published on 2014-08-12 and last updated on 2026-06-16.
References
- http://secunia.com/advisories/45299
- http://secunia.com/secunia_research/2012-26
- http://support.citrix.com/article/CTX134303
- https://exchange.xforce.ibmcloud.com/vulnerabilities/77317
Affected products (2)
- cpe:2.3:a:citrix:access_gateway_plug-in:*:49-5:*:*:enterprise:windows:*:*
- cpe:2.3:a:citrix:access_gateway_plug-in:10.0:*:*:*:enterprise:windows:*:*
More vulnerabilities in Citrix Access Gateway Plug-in
- CVE-2011-2592 — Critical (CVSS 9.3): Heap-based buffer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in Citrix Access Gateway…
All CVEs affecting Citrix Access Gateway Plug-in →
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