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6.2 Medium

CVE-2026-55026 Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally

Description

Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to disclose information locally.

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 2016 16.0 16.0.0 → < 16.0.5561.1000 16.0.5561.1000
Microsoft Office 2019 19.0 19.0.0 → latest No fix stated
Microsoft Office 365 for Mac 1.0 1.0.0 → < 16.111.26071215 16.111.26071215
Microsoft Office LTSC 2021 16.0 16.0.1 → latest No fix stated
Microsoft Office LTSC 2024 16.0 16.0.0 → latest No fix stated
Microsoft Office LTSC for Mac 2021 16.0 16.0.1 → < 16.111.26071215 16.111.26071215
Microsoft Office LTSC for Mac 2024 16.0 16.0.0 → < 16.111.26071215 16.111.26071215
Microsoft SharePoint Enterprise Server 2016 16.0 16.0.0 → < 16.0.5561.1001 16.0.5561.1001
Show the 2 other branches
Product Affected versions Fixed in
Microsoft SharePoint Server 2019 16.0 16.0.0 → < 16.0.10417.20175 16.0.10417.20175
Microsoft SharePoint Server Subscription Edition 16.0 16.0.0 → < 16.0.19725.20434 16.0.19725.20434

References

Timeline

  1. Published
  2. Last modified

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CVE-2026-108454 Buffer over-read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network 6.5 Medium CVE-2026-108455 Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network 6.5 Medium CVE-2026-108453 Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network 6.5 Medium CVE-2026-108450 Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network 8.8 High
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