CVE Watch—

CVE-2009-0238

Microsoft Office Remote Code Execution

CVSS

—

No CVSS

EPSS

43.2%

p99

KEV

YES

Apr 14, 2026

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

43.2%EPSS · 30 days43.2%

2026-09-162026-10-14

KEV catalog record

Product

Microsoft / Office

Vulnerability

Microsoft Office Remote Code Execution

Added to KEV

Apr 14, 2026

Remediate by

Apr 28, 2026

Known ransomware use

Summary description

Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-009 ; https://nvd.nist.gov/vuln/detail/CVE-2009-0238

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