CVE-2009-4487Nginx Vulnerability
nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
Published Jan 13, 2010 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2009-4487
Key Facts
Routine patching- CVE-2009-4487 is a medium-severity vulnerability (CVSS 6.8 v2) affecting Nginx (F5), rootio-nginx.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 30% probability of exploitation in the next 30 days.
- Fixed versions are available, including Nginx 1, Nginx 1.16.1-4.
- Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
Scores
CVSS v2
6.8
AV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
30%
Higher than 98.1% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
35/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| NginxF5 | 0.7.64 | 1 |
| rootio-nginxrootio | See advisory | n/a |
Patched Releases
Nginx
1, 1.16.1-4
Timeline
Publicly disclosed
Jan 13, 2010
Last updated
Aug 4, 2026
FAQ
Common Questions.
nginx 0.7.64 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
Affected: Nginx (F5) versions 0.7.64; rootio-nginx. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Nginx 1, Nginx 1.16.1-4.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
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