CVE-2011-5279: microsoft internet_information_services
Vulnerability summary
CVE-2011-5279 is a medium (CVSS 5.0) vulnerability in microsoft internet_information_services. EPSS estimates a 19.59% chance of exploitation in the next 30 days, higher than 97.3% of scored vulnerabilities. 5 public exploits are recorded.
Timeline
- 23-04-2014PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
19.59%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
+0.35 pp
From 19.24% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
5 foundExploit Reference (seclists.org)
Maturity: unknown
Exploit Reference (seclists.org)
Maturity: unknown
Exploit Reference (seclists.org)
Maturity: unknown
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft1 product
- internet_information_services4.0 | 5.0
1 vendor · 1 product