Main Vulnerability Database Vulnerabilities #VU134212

Protection Mechanism Failure in Microsoft products - CVE-2026-45459

Published: June 10, 2026

Vulnerability identifier: #VU134212

CSH Severity: Medium

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-45459

CWE-ID: CWE-693

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted Office file, bypass implemented security restrictions and gain access to sensitive information.

Affected software

Microsoft 365 Apps for Enterprise
Microsoft Office
Microsoft Office LTSC

How to mitigate CVE-2026-45459

Install updates from vendor's website.

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45459

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