CVE-2026-70318: Microsoft Excel Information Disclosure Vulnerability
Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Other sources
Microsoft Excel Information Disclosure Vulnerability
— 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 https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.112.26081010 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1000Patch KB5002901
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70318?
CVE-2026-70318 has a medium severity rating of 5.5.
What does CVE-2026-70318 affect?
CVE-2026-70318 affects multiple versions of Microsoft Excel and Microsoft Office software.
What type of vulnerability is CVE-2026-70318?
CVE-2026-70318 is categorized as an information disclosure vulnerability due to improper input validation.
How do I fix CVE-2026-70318?
To mitigate CVE-2026-70318, ensure that you update your Microsoft Office applications to the latest version provided by Microsoft.
What is the potential impact of CVE-2026-70318?
An attacker exploiting CVE-2026-70318 may disclose sensitive information locally from Microsoft Excel.