CVE-2006-2492: Microsoft Word Malformed Object Pointer Vulnerability

CVE-2006-2492 is a malformed object pointer vulnerability in Microsoft Word and Microsoft Works Suites that can allow an attacker to execute code. It matters because Word documents are routinely opened from email, shares, and downloads; a successful exploit can give the attacker control in the context of the user who opens the file.

Public detail is limited to the CISA summary and the assigned weakness. Confirm exact product editions, fixed builds, and deployment guidance against the vendor advisory before acting.

How it works

The weakness is classified as CWE-120 (buffer copy without checking size of input). In this class of flaw, the application mishandles a malformed object or related structure inside a document so that memory is corrupted. An attacker who can supply a crafted Word document can abuse that corruption to run arbitrary code when the document is opened or previewed.

No exploit mechanics, payload formats, or reliability details are provided in the given facts. Treat any document from an untrusted source as a potential delivery vehicle for this class of issue, and rely on the vendor advisory for precise technical description.

Am I affected? How to find it in your systems

Microsoft Word and Microsoft Works Suites are the affected products named in the facts. These typically run on end-user Windows workstations, terminal servers, and any system where Office or Works is installed for document editing or viewing.

• Inventory installed Office/Works packages and Word binaries via software inventory, SCCM/Intune/other endpoint management, or package queries on each host.
• Identify versions and configurations in use and compare them to the fixed versions listed in the vendor advisory; do not assume any particular build is safe without that check.
• Look for document-handling paths that auto-open or preview files (email clients, web downloads, file shares, DMS systems).
• Telemetry signs of exploitation for this class are generic: unexpected Word crashes, process anomalies spawning child processes from WINWORD.EXE, or suspicious network connections shortly after a document is opened. There is no unique indicator supplied in the facts, so correlate with EDR/AV alerts and user reports of malformed or unexpected documents.

How to remediate

Patch first. Apply the updates provided by the vendor for Microsoft Word and Microsoft Works Suites exactly as directed in the vendor advisory and in line with the CISA required action to apply updates per vendor instructions.

• Deploy the vendor update through your normal test-and-rollout process to all affected workstations and any servers that host the applications.
• After patching, verify installation via inventory so no residual vulnerable installs remain.
• For this weakness class, harden document handling: enforce Protected View or equivalent sandboxing for files from the internet and email, restrict macro and ActiveX settings to trusted locations only, and keep endpoint protection signatures current so known malicious documents are blocked on open.
• Reduce the attack surface by removing unused Office components and limiting which users have Word/Works installed.

If you can't patch immediately

Use compensating controls until the vendor update can be applied everywhere.

• Segment and restrict: limit outbound connectivity from user workstations where feasible, and isolate high-risk users who must open external documents.
• Virtual patching / content inspection: if you have a secure email gateway or document sandbox, detonate or block suspicious Word files before delivery; application-layer filters that understand Office formats can reduce exposure for this class of malformed-object issues.
• Disable or constrain the affected feature path: force documents from untrusted zones to open in read-only/Protected View, disable preview panes in Explorer and mail clients, and avoid running Word with elevated privileges.
• Monitoring: alert on Word spawning unusual child processes, rapid successive crashes, or new persistence after a document open; retain mail and file-access logs so you can trace a suspected document later.
• User guidance: instruct staff not to open unexpected attachments and to report crashes or odd behavior immediately after opening a document.

If your data may have been exposed

Actively exploited document vulnerabilities can lead to workstation compromise and follow-on data theft or ransomware, although ransomware use is not documented for this CVE in the given facts. If you suspect successful exploitation, isolate the host, preserve memory and disk evidence, rotate credentials accessible from that host, and begin incident response. You can also run a free exposure scan of your email addresses against known breach data to see whether associated accounts appear in prior breaches while you complete containment and recovery.