Microsoft Office Spoofing Vulnerability
CVE-2026-64918 is a spoofing vulnerability in Microsoft Office (rated Important, CVSS 6.5).
1 version
Facts
- Microsoft id
CVE-2026-64918- Products
- Microsoft Office
- Severity
- Important
- Impact
- Spoofing
- CVSS
- 6.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
- Customer action required
- Yes
- Release
- 2026-Sep
- Assigned by
- Microsoft
- Weakness
- CWE-522: Insufficiently Protected Credentials
- MSRC revision
- 1.0
- Status pages
- Microsoft 365 apps status
- First captured by us
- (from our first import of this list)
- Microsoft last modified
- Source
- Security updates · open the original at Microsoft
Microsoft's revision notes
- Revision 1.0, 2026-09-08:
Information published.
Microsoft says
Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.
What Microsoft changed
One version so far. If Microsoft edits it, each change shows here with what was removed and added.
First version we captured ·
The text as we first saw it
Seen by us · Microsoft's timestamp · Microsoft's page
Related changes
Other changes for Microsoft 365 apps
- Microsoft Office Word Remote Code Execution Vulnerability
- Microsoft Office Word Remote Code Execution Vulnerability
- Microsoft Office Excel Information Disclosure Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Excel Remote Code Execution Vulnerability
- Microsoft Office Word Remote Code Execution Vulnerability
- Microsoft Office Word Remote Code Execution Vulnerability
- Microsoft Office Remote Code Execution Vulnerability
Last updated