CVE-2007-2903

Microsoft Office ActiveX <1.0.1.9 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-2903. PoCs published by shinnai.

AI-analyzed exploit summary This exploit demonstrates a buffer overflow in Microsoft Office 2000's OUACTRL.OCX via the 'HelpPopup' method, leading to a denial of service (DoS) by crashing winhlp32.exe. The PoC uses VBScript to trigger the overflow with a 1000-character string.

Description

Buffer overflow in the HelpPopup method in the Microsoft Office 2000 Controllo UA di Microsoft Office ActiveX control (OUACTRL.OCX) 1.0.1.9 allows remote attackers to cause a denial of service (probably winhlp32.exe crash) via a long first argument. NOTE: it is not clear whether this issue crosses privilege boundaries.

Exploits (1)

exploitdb WORKING POC VERIFIED
by shinnai · htmldoswindows
https://www.exploit-db.com/exploits/3973

This exploit demonstrates a buffer overflow in Microsoft Office 2000's OUACTRL.OCX via the 'HelpPopup' method, leading to a denial of service (DoS) by crashing winhlp32.exe. The PoC uses VBScript to trigger the overflow with a 1000-character string.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Office 2000 (OUACTRL.OCX v. 1.0.1.9)
No auth needed
Prerequisites: Victim must open the malicious HTML file in a vulnerable system
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (7)

Core 7
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/34473
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1018107
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/24118
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/36034

Scores

EPSS 0.2851
EPSS Percentile 97.9%

Details

Status published
Products (1)
microsoft/office 2000
Published May 30, 2007
Tracked Since Feb 18, 2026