CVE-2009-0563VulnerabilityPublished 06/08/2022Updated 10/24/2026
CVE-2009-0563: Microsoft Office Buffer Overflow Vulnerability
Affects Microsoft OfficeSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 06/08/2022
- KEV deadline
- 06/22/2022
- EPSS
- 59.6% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
A buffer overflow vulnerability exists in Microsoft Office that can be triggered by a specially crafted Word document containing a tag with an invalid length field. This flaw allows remote attackers to execute arbitrary code on the affected system. The vulnerability has been exploited in the wild, indicating active use by attackers. No specific affected versions or patch information is provided in the available data.