Vulnerability intelligence
CVE-2009-0238
Microsoft Office Remote Code Execution
Microsoft Office
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.
CVSS Score
8.8
High
EPSS — Exploit Probability
0.0%
Riskier than 0% of all CVEs
Exploitation
Confirmed in the wild
Used in ransomware campaigns
Remediation
Patch available
Federal deadline 2026-04-28
CISA 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. Deadline for federal agencies: 2026-04-28.
3 articles across 3 outlets · first covered Apr 14, 2026 · latest Apr 15, 2026
Coverage timeline
-
CISA adds old Excel RCE and SharePoint flaw to KEV listsecurityaffairs.com · Apr 15, 2026
-
CISA Adds CVE-2009-0238 Excel Flaw to KEV Catalog, Urges Patchingwww.cisa.gov · Apr 14, 2026
-
CISA Flags 2009 Excel Flaw CVE‑2009‑0238 as Actively Exploitedcisa.gov · Apr 14, 2026