CVE-2026-40360: Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Other sources
Out-of-bounds read 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 16.0.5552.1000Patch KB5002865 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.109.26051019 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20128Patch KB5002871
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40360?
The severity of CVE-2026-40360 is classified as moderate due to its potential for information disclosure.
How do I fix CVE-2026-40360?
To fix CVE-2026-40360, update your affected Microsoft Excel version to the latest security patch.
What products are affected by CVE-2026-40360?
CVE-2026-40360 affects several versions of Microsoft Excel, including Office LTSC and Excel 2016.
Can CVE-2026-40360 lead to data breaches?
Yes, CVE-2026-40360 could potentially lead to data breaches by allowing unauthorized information disclosure.
Is CVE-2026-40360 a critical vulnerability?
CVE-2026-40360 is not classified as critical but still poses significant risks to affected systems.