Disclosure summary
Deserialization of untrusted data in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Source-reported weakness categories
CWE-502
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-Feb
Open original source · Updated Feb 11, 2026
Microsoft Outlook Spoofing Vulnerability
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.5
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | Microsoft SharePoint Enterprise Server 2016 | (MSRC status code 3) |
| Microsoft update guide | Microsoft SharePoint Server 2019 | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office 2019 for 32-bit editions | (MSRC status code 3) |
| Microsoft update guide | Microsoft Office 2019 for 64-bit editions | (MSRC status code 3) |
| 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 SharePoint Server Subscription Edition | (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) |
| Microsoft update guide | Microsoft Word 2016 (32-bit edition) | (MSRC status code 3) |
| Microsoft update guide | Microsoft Word 2016 (64-bit edition) | (MSRC status code 3) |
Vendor remediation references
- 5002841 · build 16.0.5539.1002 · product IDs 10950
- Vendor guidance · product IDs 10950
- 5002840 · build 16.0.5539.1002 · product IDs 10950
- Vendor guidance · product IDs 10950
- 5002834 · build 16.0.10417.20097 · product IDs 11585
- Vendor guidance · product IDs 11585
- 5002836 · build 16.0.10417.20097 · product IDs 11585
- Vendor guidance · product IDs 11585
- Click to Run · build https://aka.ms/OfficeSecurityReleases · product IDs 11573, 11574, 11762, 11763, 11952, 11953, 12420, 12421
- Vendor guidance · product IDs 11573, 11574, 11762, 11763, 11952, 11953, 12420, 12421
- Release Notes · build 16.106.26020821 · product IDs 11951, 12440
- Vendor guidance · product IDs 11951, 12440
- 5002833 · build 16.0.19127.20518 · product IDs 11961
- Vendor guidance · product IDs 11961
- 5002839 · build 16.0.5539.1002 · product IDs 10746, 10747
- Vendor guidance · product IDs 10746, 10747
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-02-10T03:00:00-05:00
MODIFIED 2026-02-11T03:00:00-05:00
INGESTED 2026-10-08T12:45:18-04:00