CVE-2009-4491

CRITICAL

thttpd 2.25b0 - Remote Code Execution via Terminal Emulator Escape Sequence

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-4491. PoCs published by evilaliv3.

AI-analyzed exploit summary This exploit leverages a command injection vulnerability in Acme 'thttpd' and 'mini_httpd' by sending a maliciously crafted HTTP request containing escape sequences that are improperly sanitized in logfiles, allowing arbitrary command execution.

Description

thttpd 2.25b0 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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by evilaliv3 · textremotemultiple
https://www.exploit-db.com/exploits/33499

This exploit leverages a command injection vulnerability in Acme 'thttpd' and 'mini_httpd' by sending a maliciously crafted HTTP request containing escape sequences that are improperly sanitized in logfiles, allowing arbitrary command execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: thttpd 2.25b, mini_httpd 1.19
No auth needed
Prerequisites: Network access to the target server · Target server running vulnerable version of thttpd or mini_httpd
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4

Scores

CVSS v3 9.8
EPSS 0.0271
EPSS Percentile 86.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-20 CWE-94
Status published
Products (1)
acme/thttpd 2.25 b
Published Jan 13, 2010
Tracked Since Feb 18, 2026