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CVE-2026-45459

LOWCVSS 3.3/10EPSS 0.37%

Last modified

CVE-2026-45459 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1
3.3/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS Probability
0.37%

29.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Microsoft365 AppsAll versions
MicrosoftMicrosoft 365All versions
MicrosoftOffice 2021All versions
MicrosoftOffice 2024All versions

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-45459?
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 a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.
How do I fix CVE-2026-45459?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45459?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST