CVE tracker / CVE-2026-26175

CVE-2026-26175

CVE-2026-26175 is the Windows Boot Manager Security Feature Bypass Vulnerability. Microsoft rates it Important, CVSS 4.6. It is not in CISA's Known Exploited Vulnerabilities catalog. Published April 14, 2026.

Risk summary

MediumSecurity Feature Bypass
4.6
CVSS v3 base
0.4%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV

Microsoft describes it: “Use of uninitialized resource in Windows Boot Manager allows an unauthorized attacker to bypass a security feature with a physical attack.”

How to fix it

Microsoft lists 27 affected products and the update that fixes each:

What Microsoft changed

Details

Weakness
CWE-908: Use of Uninitialized Resource
Publicly disclosed (Microsoft)
No
Exploited (Microsoft)
No
Known exploited (CISA KEV)
Not listed
Published
April 14, 2026
Last revised
April 14, 2026

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.