CVE-2026-53255: Bluetooth: MGMT: validate advertising TLV before type checks

CSIRTS triage

What

The vulnerability involves a lack of validation for advertising TLV before type checks in Bluetooth.

Who is affected

Deployments using Bluetooth technology may be affected.

Urgency

Remediation is medium urgency due to the medium severity rating.

Action

Monitor for updates regarding this issue.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

medium — CVSS 5.5

Published

2026-06-09

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53255

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.

• Low exploitation riskCVE-2026-532550.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownMultiple vulnerabilities in Microsoft Azure Linux (June 29, 2026)cert-fr-avis

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.

• medium[UPDATE] [medium] Linux Kernel (Bluetooth): Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-06
• unknownCVE-2026-53358: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use chan…nvd · 2026-07-02
• unknownCVE-2026-53357: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix UAF in l2ca…nvd · 2026-07-02
• unknownCVE-2026-14035: Chromium: CVE-2026-14035 Insufficient policy enforcement in Bluetoothmsrc · 2026-07-02
• unknownCVE-2026-13879: Chromium: CVE-2026-13879 Use after free in Bluetoothmsrc · 2026-07-02
• mediumCVE-2026-53357: Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()msrc · 2026-07-02

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