8.8
High
CVE-2026-83891 Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network
Description
Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft 365 Apps for Enterprise 16.0 | 16.0.1 → latest | No fix stated |
| Microsoft Office 365 for Mac 1.0 | 1.0.0 → < 16.114.26101123 | 16.114.26101123 |
| Microsoft Office LTSC 2021 16.0 | 16.0.1 → < 16.0.14334.20974 | 16.0.14334.20974 |
| Microsoft Office LTSC 2024 16.0 | 16.0.0 → < 16.0.17932.21056 | 16.0.17932.21056 |
| Microsoft Office LTSC for Mac 2021 16.0 | 16.0.1 → < 16.114.26101123 | 16.114.26101123 |
| Microsoft Office LTSC for Mac 2024 16.0 | 16.0.0 → < 16.114.26101123 | 16.114.26101123 |
Other CVEs of Microsoft 365 Apps for Enterprise
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Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network
6.5
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Buffer over-read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network
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CVE-2026-108453
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network
6.5
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CVE-2026-108451
Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code over a network
8.8
High