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CVE-2011-1978

MEDIUM · CVSS 4.3EPSS 20.2%EU EUVD

Microsoft .NET Framework 2.0 SP2, 3.5.1, and 4 does not properly validate the System.Net.Sockets trust level, which allows remote attackers to obtain sensitive information or trigger arbitrary outbound network traffic via (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka "Socket Restriction Bypass Vulnerability."

Key facts

CVSS score
4.3 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness (CWE)
CWE-200
EPSS score
20.2% (97th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-1972)
Published
August 10, 2011
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1972 in the EU Vulnerability Database. Last updated in EUVD on October 17, 2024.

View on the EU Vulnerability Database

Affected products

  • microsoft / .net framework
  • microsoft / .net framework
  • microsoft / .net framework
  • microsoft / windows 2003 server
  • microsoft / windows 7
  • microsoft / windows 7
  • microsoft / windows server 2003
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows vista
  • microsoft / windows xp
  • microsoft / windows xp

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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