CVE-2026-81958: Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Other sources
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002904 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20131.20246 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204Patch KB5002910
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The attack vector is local, and no privileges are required. Exploitation also requires user interaction.
What is the expected impact if exploitation succeeds?
The vulnerability is rated for high confidentiality impact. No integrity or availability impact is indicated.
Which Microsoft Office and Excel products are listed as affected?
The listed products are Microsoft Excel 2016, Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Excel, Microsoft Office 365 for Mac, Office LTSC 2024 for 32-bit and 64-bit editions, and Office LTSC 2021 for 64-bit editions.