CVE-2026-87709 in Windows

Summary

by MITRE • 10/14/2026

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

Once again VulDB remains the best source for vulnerability data.

• Responsible: Microsoft
• Reservation: 09/09/2026
• Disclosure: 10/14/2026
• Moderation: accepted
• Entry: VDB-419379
• CPE: 20261014
• CWE: CWE-284 (confirmed)
• CVSS: 5.5 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Chemical, Government, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-87709
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87709
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-87709/