CVE-2026-45455: 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 16.0.5556.1001Patch KB5002877 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.110.26061317 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20137Patch KB5002875
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45455?
CVE-2026-45455 has a severity rating of low, classified as 3.3 on the CVSS scale.
How do I fix CVE-2026-45455?
To address CVE-2026-45455, it is recommended to update Microsoft Excel to the latest version provided by Microsoft.
What type of vulnerability is CVE-2026-45455?
CVE-2026-45455 is classified as an information disclosure vulnerability that involves out-of-bounds reading.
Which software versions are affected by CVE-2026-45455?
CVE-2026-45455 affects several versions of Microsoft Excel, including Microsoft Excel 2016 and Microsoft 365 Apps for Enterprise.
What can an attacker do with CVE-2026-45455?
An attacker exploiting CVE-2026-45455 can disclose sensitive information over a network.