A stack-based buffer overflow exists in the Office Web Components ActiveX Control (notably the Spreadsheet object) in Microsoft Office XP SP3, Office 2000 Web Components SP3, Office XP Web Components SP3, BizTalk Server 2002, and Visual Studio .NET 2003 SP1. The vulnerability is triggered when a crafted property value (typically a long string) is passed to the control, allowing remote attackers to execute arbitrary code if a user visits a malicious web page.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit exploit module targeting a buffer overflow vulnerability (CVE-2009-1534) in the Microsoft Office Web Components (OWC) Spreadsheet ActiveX control. The exploit is delivered via a malicious HTML page served by the Metasploit framework's HTTP server. When a victim visits the attacker's page using Internet Explorer on a vulnerable Windows XP system with Office XP, a specially crafted 'HTMLURL' parameter triggers a buffer overflow, allowing arbitrary code execution. The module supports multiple targets (Office XP SP0 and SP3) and allows customizable payloads. The main file is written in Ruby and leverages Metasploit's HTTP server and SEH exploitation mixins. Key fingerprintable endpoints include the default HTTP URI (/) and the specific ActiveX ClassIds for the vulnerable controls.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.