VDB
msrc_CVE-2026-21511
msrc_CVE-2026-21511
PUBLISHED
CVSS 7.5 HIGH
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 16.0.5539.1002 | ||
| Microsoft Office LTSC for Mac 2021 16.106.26020821 | ||
| Microsoft 365 Apps for Enterprise for 32-bit Systems <https://aka.ms/OfficeSecurityReleases | ||
| Microsoft SharePoint Server 2019 <16.0.10417.20097 | ||
| Microsoft SharePoint Enterprise Server 2016 <16.0.5539.1002 | ||
| Microsoft 365 Apps for Enterprise for 64-bit Systems <https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office LTSC 2021 for 64-bit editions https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office 2019 for 64-bit editions https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office LTSC for Mac 2021 <16.106.26020821 | ||
| Microsoft Office 2019 for 32-bit editions <https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office LTSC 2021 for 64-bit editions <https://aka.ms/OfficeSecurityReleases | ||
| Microsoft 365 Apps for Enterprise for 32-bit Systems https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office LTSC 2021 for 32-bit editions https://aka.ms/OfficeSecurityReleases | ||
| Microsoft 365 Apps for Enterprise for 64-bit Systems https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office 2019 for 64-bit editions <https://aka.ms/OfficeSecurityReleases | ||
| Microsoft SharePoint Server Subscription Edition <16.0.19127.20518 | ||
| Microsoft SharePoint Server 2019 16.0.10417.20097 | ||
| Microsoft SharePoint Server Subscription Edition 16.0.19127.20518 | ||
| Microsoft Office 2019 for 32-bit editions https://aka.ms/OfficeSecurityReleases | ||
| Microsoft Office LTSC 2021 for 32-bit editions <https://aka.ms/OfficeSecurityReleases |
Timeline
- Feb 10, 2026 CVE Published
- Feb 11, 2026 CVE Updated
- Nov 1, 2026 Security Advisory
- Nov 1, 2026 Security Advisory
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21511 advisory
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-21511.json advisory
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 url
- https://support.microsoft.com/lifecycle url
- https://www.first.org/cvss url
- https://support.microsoft.com/help/5002841 fix
- https://support.microsoft.com/help/5002840 fix
- https://support.microsoft.com/help/5002834 fix
- https://support.microsoft.com/help/5002836 fix
- https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates fix
- https://go.microsoft.com/fwlink/p/?linkid=831049 fix
- https://support.microsoft.com/help/5002833 fix
- https://support.microsoft.com/help/5002839 fix