CVE-2009-0557 is a remote code execution vulnerability in multiple versions of Microsoft Excel, including Office 2000 SP3, Office XP SP3, Office 2003 SP3, Office 2004 and 2008 for Mac, Excel 2007 SP1 and SP2, Open XML File Format Converter for Mac, Excel Viewer 2003 SP3, Excel Viewer, and the Office Compatibility Pack. The vulnerability is triggered when Excel processes a specially crafted file containing a malformed record object, leading to memory corruption and potential execution of arbitrary code.
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.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.