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
Published Apr 23, 2014
5.0
MEDIUMCVSS 2.0
EPSS 19.24%
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
No data.
- 4.0
- 5.0
Running on/with
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 19.24% (0.19240) | 97.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 19.09% (0.19092) | 96.95th | v5 (v2026.06.15) |
| Mar 30, 2025 | 8.55% (0.08547) | 91.57th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.58% (0.12578) | 89.90th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.55% (0.08547) | 91.75th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.80% (0.00796) | 82.32th | v3 (v2023.03.01) |
| Jun 9, 2024 | 0.80% (0.00796) | 81.62th | v3 (v2023.03.01) |
| Dec 4, 2023 | 1.13% (0.01126) | 82.94th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.05% (0.01050) | 81.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 33.19% (0.33187) | 97.64th | v2 (v2022.01.01) |
| Feb 4, 2022 | 33.19% (0.33187) | 96.57th | v2 (v2022.01.01) |
No CWE recorded.
References (6)
- http://hi.baidu.com/yuange1975/item/b2cc7141c22108e91e19bc2e x_refsource_MISCThird Party Advisory
- http://seclists.org/fulldisclosure/2012/Apr/0 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2012/Apr/13 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2014/Apr/108 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2014/Apr/128 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2014/Apr/247 mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://hi.baidu.com/yuange1975/item/b2cc7141c22108e91e19bc2e | x_refsource_MISCThird Party Advisory | |
| http://seclists.org/fulldisclosure/2012/Apr/0 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://seclists.org/fulldisclosure/2012/Apr/13 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://seclists.org/fulldisclosure/2014/Apr/108 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://seclists.org/fulldisclosure/2014/Apr/128 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory | |
| http://seclists.org/fulldisclosure/2014/Apr/247 | mailing-listx_refsource_FULLDISCExploitMailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.