Microsoft Office Excel Remote Code Execution Vulnerability
Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened. This malicious file could be delivered as an email attachment or hosted on a malicious website. An attacker could leverage this vulnerability by creating a specially crafted Excel file, which, when opened, allowing an attacker to execute remote code on the affected system.
- Vendor
- Microsoft
- Product
- Office
- CVSS
- 8.8
- EPSS (exploit probability)
- 44.1%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2007-0671 being exploited?
Yes. CISA added CVE-2007-0671 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 44.1% (scored November 1, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2007-0671 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Microsoft Office CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-124194 Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability | [ MEDIUM ] | 6.5 | 1.6% | |
| CVE-2009-0238 Microsoft Office Remote Code Execution | [ HIGH ] | 8.8 | 42.9% | |
| CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability | [ HIGH ] | 7.8 | 1.6% | |
| CVE-2026-21509 Microsoft Office Security Feature Bypass Vulnerability | [ HIGH ] | 7.8 | 70.8% | |
| CVE-2009-0556 Microsoft Office PowerPoint Code Injection Vulnerability | [ HIGH ] | 8.8 | 67.3% | |
| CVE-2023-23397 Microsoft Office Outlook Privilege Escalation Vulnerability | [ CRITICAL ] | 9.8 | 97.2% | |
| CVE-2023-21715 Microsoft Office Publisher Security Feature Bypass Vulnerability | [ HIGH ] | 7.3 | 12.0% | |
| CVE-2013-1331 Microsoft Office Buffer Overflow Vulnerability | [ HIGH ] | 7.8 | 79.8% |