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CVE-2026-68802: Microsoft Excel Leaks Sensitive Local Data

CVE-2026-68802 · published 2 months ago

Summary

This vulnerability affects Microsoft Excel, allowing an attacker to access sensitive local information. If exploited, an attacker could potentially read unauthorized data from a user's system. To protect your data, update Microsoft Excel to the latest version or apply the recommended security patch.

What to do

Update microsoft microsoft 365 apps for enterprise to version https://aka.ms/OfficeSecurityReleases or later.
Update microsoft microsoft excel 2016 to version 16.0.5565.1001 or later.
Update microsoft microsoft office 2019 to version https://aka.ms/OfficeSecurityReleases or later.
Update microsoft microsoft office 365 for mac to version 16.112.26081010 or later.
Update microsoft microsoft office ltsc 2021 to version https://aka.ms/OfficeSecurityReleases or later.
Update microsoft microsoft office ltsc 2024 to version https://aka.ms/OfficeSecurityReleases or later.
Update microsoft microsoft office ltsc for mac 2021 to version 16.112.26081010 or later.
Update microsoft microsoft office ltsc for mac 2024 to version 16.112.26081010 or later.
Update microsoft office online server to version 16.0.10417.20175 or later.

Affected software

Vendor	Product	Affected versions
microsoft	microsoft 365 apps for enterprise	< https://aka.ms/OfficeSecurityReleases 16.0.1
microsoft	microsoft excel 2016	< 16.0.5565.1001
microsoft	microsoft office 2019	< https://aka.ms/OfficeSecurityReleases 19.0.0
microsoft	microsoft office 365 for mac	< 16.112.26081010
microsoft	microsoft office ltsc 2021	< https://aka.ms/OfficeSecurityReleases 16.0.1
microsoft	microsoft office ltsc 2024	< https://aka.ms/OfficeSecurityReleases 16.0.0
microsoft	microsoft office ltsc for mac 2021	< 16.112.26081010
microsoft	microsoft office ltsc for mac 2024	< 16.112.26081010
microsoft	365_apps	All versions `cpe:2.3:a:microsoft:365_apps:-::::enterprise::x64:*`
microsoft	excel	2016 `cpe:2.3:a:microsoft:excel:2016::::::x64:`
microsoft	microsoft_365	All versions `cpe:2.3:a:microsoft:microsoft_365:-:::::macos::`
microsoft	office_2019	All versions `cpe:2.3:a:microsoft:office_2019:-::::::x64:`
microsoft	office_2021	All versions `cpe:2.3:a:microsoft:office_2021:-::::ltsc:-:x64:`
microsoft	office_2024	All versions `cpe:2.3:a:microsoft:office_2024:-::::ltsc:-:x64:`
microsoft	office online server	< 16.0.10417.20175

Original advisory text

Microsoft Excel Information Disclosure Vulnerability

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68802 vendor-advisory patch

Fix within

Internet-facing 60 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker partial control

Severity

5.5 Medium

Exploitation

<1% chance of attack within 30 days

Type

CWE-125Out-of-bounds Read

Timeline

Published11 Aug 2026

Updated4 Nov 2026

First seen11 Aug 2026

Sources

CVE-2026-68802 · NVD

CVE-2026-68802 · MITRE

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