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Servers and applications

CVE-2011-5279

CRLF injection vulnerability in the CGI implementation in Microsoft Internet Information Services (IIS) 4.x and 5.x on Windows NT and Windows 2000 allows remote attackers to modify arbitrary uppercase environment variables via a \n (newline) character in an HTTP header.

Severity
Medium 5.0
Published
23 Apr 2014
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
Microsoft IISServers and applications · cpe:a:microsoft:internet_information_services
  • Version 4.0
  • Version 5.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-5279
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-5279