# CVE-2012-10053

## Summary

- **CVE ID:** CVE-2012-10053
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-121
- **Published:** Aug 8, 2025
- **Last Modified:** Apr 7, 2026

## Description

Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This flaw allows remote attackers to execute arbitrary code with the privileges of the web server process. The vulnerability is triggered before authentication.

## Affected Products

- PMSoftware — Simple Web Server (2.2 rc2)

## References

- [CNA](https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/sws_connection_bof.rb)
- [CNA](https://www.exploit-db.com/exploits/19937)
- [CNA](https://www.exploit-db.com/exploits/20028)
- [CNA](http://ghostinthelab.wordpress.com/2012/07/19/simplewebserver-2-2-rc2-remote-buffer-overflow-exploit/)
- [CNA](http://www.pmx.it/software/sws.asp)
- [CNA](https://www.vulncheck.com/advisories/simple-web-server-connection-header-buffer-overflow)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 64.32%
- **EPSS Percentile:** 98.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._