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CVE-2026-53208: Bluetooth: L2CAP: reject BR/EDR signaling packets over MTUsig

highCVSS 7CVE-2026-53208

CSIRTS triage

product: BluetoothOther
What
The system rejects BR/EDR signaling packets over MTUsig.
Who is affected
Deployments using Bluetooth technology.
Urgency
Remediation is urgent due to the high severity of the vulnerability.
Action
Update Bluetooth stack to the latest version.

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-2026-53208

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-2026-53208coverage & exploitation statusNVD · CVE.org

Recent advisories for Bluetooth

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