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Actively exploited · Published Jun 10, 2009 · Assigned by microsoft

CVE-2009-0563

High 7.8 Exploited

In plain English

A high-severity out-of-bounds write in Office from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on June 8, 2022). The chance it is exploited in the next 30 days is estimated at 59.6% (higher than 99.1% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)59.6%top 0.9% of all CVEs
Exploited in the wildYesCISA KEV since Jun 8, 2022
Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jun 22, 2022.

Official description

Stack-based buffer overflow in Microsoft Office Word 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Microsoft Office for Mac 2004 and 2008; Open XML File Format Converter for Mac; Microsoft Office Word Viewer 2003 SP3; Microsoft Office Word Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a Word document with a crafted tag containing an invalid length field, aka "Word Buffer Overflow Vulnerability."

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References