What’s Vulnerable › Vulnerabilities

CVE-2011-5279

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 19.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2014-04-23 · updated 2026-06-16

Description

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.

Affected products

• Microsoft IIS: 4.0, 5.0

References

• http://hi.baidu.com/yuange1975/item/b2cc7141c22108e91e19bc2e
• http://seclists.org/fulldisclosure/2012/Apr/0
• http://seclists.org/fulldisclosure/2012/Apr/13
• http://seclists.org/fulldisclosure/2014/Apr/108
• http://seclists.org/fulldisclosure/2014/Apr/128
• http://seclists.org/fulldisclosure/2014/Apr/247
• http://hi.baidu.com/yuange1975/item/b2cc7141c22108e91e19bc2e
• http://seclists.org/fulldisclosure/2012/Apr/0
• http://seclists.org/fulldisclosure/2012/Apr/13
• http://seclists.org/fulldisclosure/2014/Apr/108
• http://seclists.org/fulldisclosure/2014/Apr/128
• http://seclists.org/fulldisclosure/2014/Apr/247

Get alerted when CVE-2011-5279 or the next vulnerability affects your stack