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Description

Missing cryptographic step in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.

PUBLISHED Reserved 2026-07-01 | Published 2026-07-14 | Updated 2026-07-14 | Assigner microsoft




MEDIUM: 6.0CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

Problem types

CWE-325: Missing Cryptographic Step

Product status

10.0.17763.0 (custom) before 10.0.17763.9020
affected

10.0.19044.0 (custom) before 10.0.19044.7548
affected

10.0.19045.0 (custom) before 10.0.19045.7548
affected

10.0.26100.0 (custom) before 10.0.26100.8875
affected

10.0.26200.0 (custom) before 10.0.26100.8875
affected

10.0.28000.0 (custom) before 10.0.28000.2525
affected

6.2.9200.0 (custom) before 6.2.9200.26226
affected

6.2.9200.0 (custom) before 6.2.9200.26226
affected

6.3.9600.0 (custom) before 6.3.9600.23291
affected

6.3.9600.0 (custom) before 6.3.9600.23291
affected

10.0.14393.0 (custom) before 10.0.14393.9339
affected

10.0.14393.0 (custom) before 10.0.14393.9339
affected

10.0.17763.0 (custom) before 10.0.17763.9020
affected

10.0.17763.0 (custom) before 10.0.17763.9020
affected

10.0.20348.0 (custom) before 10.0.20348.5386
affected

10.0.26100.0 (custom) before 10.0.26100.33158
affected

10.0.26100.0 (custom) before 10.0.26100.33158
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58638 (Windows Boot Loader Security Feature Bypass Vulnerability) vendor-advisory patch

cve.org (CVE-2026-58638)

nvd.nist.gov (CVE-2026-58638)

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