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CVE-2026-45640: Windows Bluetooth Port Driver Elevation of Privilege Vulnerability

highCVSS 7CVE-2026-45640
Use after free in Windows Bluetooth Port Driver allows an authorized attacker to elevate privileges locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Bluetooth Port DriverPrivilege escalation
What
A use after free vulnerability allows an authorized attacker to elevate privileges locally.
Who is affected
Authorized users of the Windows Bluetooth Port Driver.
Urgency
Remediation is important due to the high severity and potential for local privilege escalation.
Action
Install the latest updates for the Windows Bluetooth Port Driver.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45640

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-45640coverage & exploitation statusNVD · CVE.org

Recent advisories for Windows Bluetooth Port

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center