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LOW · 3.3

CVE-2026-45459

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

Vulnerability Description

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
Microsoft365 Apps-
MicrosoftMicrosoft 365-
MicrosoftOffice 2021-
MicrosoftOffice 2024-

Related Weaknesses (CWE)

CWE-693

References

FAQ

What is CVE-2026-45459?

CVE-2026-45459 is a vulnerability with a CVSS score of 3.3 (LOW). Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

How severe is CVE-2026-45459?

CVE-2026-45459 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-45459?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft 365 Apps, Microsoft Microsoft 365, Microsoft Office 2021, Microsoft Office 2024.