CVE-2001-0168

AT&T WinVNC < 3.3.3r7 - Remote Code Execution via Long HTTP GET Request

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2001-0168. PoCs published by Metasploit, including Metasploit module exploits/windows/vnc/winvnc_http_get.

AI-analyzed exploit summary This exploit targets a buffer overflow in WinVNC Web Server <= v3.3.3r7 via an overly long GET request. It leverages stack-based overflow to execute arbitrary code, with specific return addresses for different Windows versions.

Description

Buffer overflow in AT&T WinVNC (Virtual Network Computing) server 3.3.3r7 and earlier allows remote attackers to execute arbitrary commands via a long HTTP GET request when the DebugLevel registry key is greater than 0.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16491

This exploit targets a buffer overflow in WinVNC Web Server <= v3.3.3r7 via an overly long GET request. It leverages stack-based overflow to execute arbitrary code, with specific return addresses for different Windows versions.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: WinVNC Web Server <= v3.3.3r7
No auth needed
Prerequisites: Debugging mode with logging enabled in WinVNC · Network access to the target on port 5800
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/vnc/winvnc_http_get.rb

This Metasploit module exploits a buffer overflow in AT&T WinVNC's web server (v3.3.3r7 or earlier) via an overly long GET request when debugging mode with logging is enabled. It achieves remote code execution by overwriting the stack with a crafted payload and return address.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Racy
Target: AT&T WinVNC <= v3.3.3r7
No auth needed
Prerequisites: Debugging mode with logging enabled in WinVNC · Access to the WinVNC web server on port 5800
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/2306
US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/598581
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=vnc-list&m=98080763005455&w=2
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/6026

Scores

EPSS 0.7073
EPSS Percentile 99.3%

Details

Status published
Products (1)
att/winvnc < 3.3.3r7
Published May 03, 2001
Tracked Since Feb 18, 2026