Disclosure summary
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Source-reported weakness categories
CWE-822
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Jan
Open original source · Updated Jan 13, 2026
Microsoft Excel Remote Code Execution Vulnerability
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.8
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | Microsoft 365 Apps for Enterprise for 32-bit Systems | (MSRC status code 3) |
| Microsoft update guide | Microsoft 365 Apps for Enterprise for 64-bit Systems | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC for Mac 2021 | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC 2021 for 64-bit editions | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC 2021 for 32-bit editions | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC 2024 for 32-bit editions | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC 2024 for 64-bit editions | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office LTSC for Mac 2024 | (MSRC status code 3) |
Vendor remediation references
- Click to Run · build https://aka.ms/OfficeSecurityReleases · product IDs 11762, 11763, 11952, 11953, 12420, 12421
- Vendor guidance · product IDs 11762, 11763, 11952, 11953, 12420, 12421
- Release Notes · build 16.105.26011018 · product IDs 11951, 12440
- Vendor guidance · product IDs 11951, 12440
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-01-13T03:00:00-05:00
MODIFIED 2026-01-13T03:00:00-05:00
INGESTED 2026-10-08T12:45:22-04:00