Medium severity6.5NVD Advisory· Published Sep 8, 2026· Updated Sep 9, 2026
CVE-2026-64918
CVE-2026-64918
Description
Insufficiently protected credentials in Microsoft Office allows an unauthorized attacker to perform spoofing over a network.
Affected products
11cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:*+ 1 more
- cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x64:*
- cpe:2.3:a:microsoft:office_2016:-:*:*:*:-:*:x86:*
cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*+ 6 more
- cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:office_2019:-:*:*:*:*:*:x86:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
- (no CPE)
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64918nvdPatchVendor Advisory
News mentions
3- Patch Tuesday - September 2026Rapid7 Blog · Sep 8, 2026
- Microsoft Office: 22 Vulnerabilities Including RCE Flaws Disclosed TogetherVypr Intelligence · Sep 8, 2026
- Massive Microsoft Patch Tuesday September 2026 – 973 Vulnerabilities Fixed, Including 2 Zero-DaysCyber Security News · Sep 8, 2026