CVE-2011-5279
MEDIUM · CVSS 5.0EPSS 19.6%EU EUVD
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N- EPSS score
- 19.6% (97th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-5178)
- Published
- April 23, 2014
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-5178 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / internet information services
- microsoft / internet information services
- microsoft / windows 2000
- microsoft / windows nt
References
- http://hi.baidu.com/yuange1975/item/b2cc7141c22108e91e19bc2e(Third Party Advisory)
- http://seclists.org/fulldisclosure/2012/Apr/0(Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2012/Apr/13(Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2014/Apr/108(Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2014/Apr/128(Exploit, Mailing List, Third Party Advisory)
- http://seclists.org/fulldisclosure/2014/Apr/247(Exploit, Mailing List, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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