CVE-2026-87709

Improper access control in Windows Host Guardian Service allows an authorized attacker to perform tampering locally.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)

CWE

CWE-250

Published

2026-10-13

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87709

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