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TI-2011-02256 Aliases CVE-2011-2593GHSA-fxxh-pp9v-6qr6

Integer overflow in the StartEpa method in the nsepacom ActiveX control (nsepa.exe) in…

Priority LOW 37CWE-189Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.03986 90th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:citrix:access_gateway_plug-in:*:49-5:*:*:enterprise:windows:*:*up to 9.3VulnerableCitrix
cpe:2.3:a:citrix:access_gateway_plug-in:10.0:*:*:*:enterprise:windows:*:*10.0VulnerableCitrix
  • cpe:2.3:a:citrix:access_gateway_plug-in:*:49-5:*:*:enterprise:windows:*:* Versions up to 9.3 Vulnerable ·Citrix
  • cpe:2.3:a:citrix:access_gateway_plug-in:10.0:*:*:*:enterprise:windows:*:* Versions 10.0 Vulnerable ·Citrix

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-2593
  2. 2026-10-03 Alias added: GHSA-fxxh-pp9v-6qr6

References

Patch 1

  • TI-2011-02255 Heap-based buffer overflow in the StartEpa method in the nsepacom ActiveX control… CVSS 2.0HIGH 9.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences