CVE-2026-97779
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Published Oct 13, 2026 · updated Oct 14, 2026 · Microsoft Microsoft 365
Affected Microsoft products: Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC for Mac 2024, Microsoft Office LTSC 2021 for 64-bit editions, Office Online Server, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 13, 2026 · NIST NVD
Detected
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Oct 14, 2026 · NIST NVD
Updated
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Affected
- cpe microsoft/365 appsversion unspecified
- cpe microsoft/microsoft 365version unspecified
- cpe microsoft/office 2021version unspecified
- cpe microsoft/office 2024version unspecified
- microsoft Microsoft Office 365 for Macversion unspecified
- microsoft Microsoft Office LTSC 2021 for 32-bit editionsversion unspecified
- microsoft Microsoft Office LTSC 2021 for 64-bit editionsversion unspecified
- microsoft Microsoft Office LTSC 2024 for 32-bit editionsversion unspecified
- microsoft Microsoft Office LTSC 2024 for 64-bit editionsversion unspecified
- microsoft Microsoft Office LTSC for Mac 2021version unspecified
- microsoft Microsoft Office LTSC for Mac 2024version unspecified
- microsoft Office Online Serverversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-97779
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-97779
30-day exploitation probability 0.8%
first.org - Microsoft Security Update GuideVendor advisoryCVE-2026-97779
Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC for Mac 2024, Microsoft Office LTSC 2021 for 64-bit editions, Office Online Server
msrc.microsoft.com - NIST NVDVulnerability recordCVE-2026-97779
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
nvd.nist.gov