CVE-2009-0238: Microsoft Office Remote Code Execution
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
CSIRTS triage
- What
- Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system.
- Who is affected
- Users of Microsoft Office Excel who open specially crafted Excel files.
- Urgency
- Immediate action is required as the vulnerability is actively exploited and rated critical.
- Action
- Update Microsoft Office to the latest version to mitigate this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2009-0238
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2009-0238Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2009-0238 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Microsoft Office Remote
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- highCVE-2026-44819: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
- highCVE-2026-45474: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
- highCVE-2026-45645: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
- highCVE-2026-45472: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
- highCVE-2026-45475: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
- highCVE-2026-44824: Microsoft Office Remote Code Execution Vulnerabilitymsrc · 2026-06-09
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