CVE-2026-70096
Critical
Description
Heap-based buffer overflow in Windows Rich Text Edit Control allows an unauthorized attacker to execute code over a network.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Windows 10 Version 1607
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- Microsoft Windows 10 Version 160710.0.14393.9612 or later
- Microsoft Microsoft 365 Apps for Enterprisehttps://aka.ms/OfficeSecurityReleases or later
- Microsoft Microsoft Office 365 for Mac16.114.26101123 or later
- Microsoft Microsoft Office LTSC 202116.0.14334.20974 or later
- Microsoft Microsoft Office LTSC 202416.0.17932.21056 or later
- Microsoft Microsoft Office LTSC for Mac 202116.114.26101123 or later
- Microsoft Microsoft Office LTSC for Mac 202416.114.26101123 or later
- Microsoft Windows 10 Version 180910.0.17763.9376 or later
- Microsoft Windows 10 Version 21H210.0.19044.7807 or later
- Microsoft Windows 10 Version 22H210.0.19045.7807 or later
- Microsoft Windows 11 version 23H210.0.22631.7652 or later
- Microsoft Windows 11 Version 23H210.0.22631.7652 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1607 | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Microsoft 365 Apps for Enterprise | 16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| Microsoft Microsoft Office 365 for Mac | 1.0.0 ≤ v < 16.114.26101123 | 16.114.26101123 |
| Microsoft Microsoft Office LTSC 2021 | 16.0.1 ≤ v < 16.0.14334.20974 | 16.0.14334.20974 |
| Microsoft Microsoft Office LTSC 2024 | 16.0.0 ≤ v < 16.0.17932.21056 | 16.0.17932.21056 |
| Microsoft Microsoft Office LTSC for Mac 2021 | 16.0.1 ≤ v < 16.114.26101123 | 16.114.26101123 |
| Microsoft Microsoft Office LTSC for Mac 2024 | 16.0.0 ≤ v < 16.114.26101123 | 16.114.26101123 |
| Microsoft Windows 10 Version 1809 | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows 10 Version 21H2 | 10.0.19044.0 ≤ v < 10.0.19044.7807 | 10.0.19044.7807 |
| Microsoft Windows 10 Version 22H2 | 10.0.19045.0 ≤ v < 10.0.19045.7807 | 10.0.19045.7807 |
| Microsoft Windows 11 version 23H2 | 10.0.22631.0 ≤ v < 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 23H2 | 10.0.22631.0 ≤ v < 10.0.22631.7652 | 10.0.22631.7652 |
| Microsoft Windows 11 Version 24H2 | 10.0.26100.0 ≤ v < 10.0.26100.9711 | 10.0.26100.9711 |
| Microsoft Windows 11 Version 25H2 | 10.0.26200.0 ≤ v < 10.0.26200.9711 | 10.0.26200.9711 |
| Microsoft Windows 11 version 26H1 | 10.0.28000.0 ≤ v < 10.0.28000.3231 | 10.0.28000.3231 |
| Microsoft Windows 11 Version 26H2 | 10.0.26300.0 ≤ v < 10.0.26300.9711 | 10.0.26300.9711 |
| Microsoft Windows Server 2012 | 6.2.9200.0 ≤ v < 6.2.9200.26434 | 6.2.9200.26434 |
| Microsoft Windows Server 2012 (Server Core installation) | 6.2.9200.0 ≤ v < 6.2.9200.26434 | 6.2.9200.26434 |
| Microsoft Windows Server 2012 R2 | 6.3.9600.0 ≤ v < 6.3.9600.23470 | 6.3.9600.23470 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 ≤ v < 6.3.9600.23470 | 6.3.9600.23470 |
| Microsoft Windows Server 2016 | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2016 (Server Core installation) | 10.0.14393.0 ≤ v < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2019 | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2019 (Server Core installation) | 10.0.17763.0 ≤ v < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2022 | 10.0.20348.0 ≤ v < 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft Windows Server 2025 | 10.0.26100.0 ≤ v < 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft Windows Server 2025 (Server Core installation) | 10.0.26100.0 ≤ v < 10.0.26100.33650 | 10.0.26100.33650 |
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