CVE-2026-58556: Bluetooth Privilege Escalation Vulnerability

CVE-2026-58556 Overview

CVE-2026-58556 is a permission control vulnerability in the Bluetooth module disclosed through the Huawei Security Bulletin. The flaw is categorized under [CWE-264] (Permissions, Privileges, and Access Controls) and stems from improper enforcement of access restrictions within the Bluetooth subsystem. According to the vendor advisory, successful exploitation may affect availability of the affected device. The attack vector is local, meaning an adversary requires prior access to the target device to trigger the condition. No authentication or user interaction is required to invoke the vulnerable code path, though the impact is limited to partial confidentiality and availability loss.

Critical Impact
Local attackers can abuse missing permission checks in the Bluetooth module to degrade device availability and access limited data without authentication.

Affected Products

Products covered by the July 2026 Huawei Security Bulletin
Devices with the affected Bluetooth module component
Refer to the Huawei Security Bulletin for the authoritative product and version list

Discovery Timeline

2026-07-15 - CVE CVE-2026-58556 published to NVD
2026-07-15 - Last updated in NVD database

Technical Details for CVE-2026-58556

Vulnerability Analysis

The vulnerability resides in the Bluetooth module and results from insufficient permission control. The affected code path fails to verify that the caller holds the required privileges before performing a Bluetooth-related operation. A local process running on the device can invoke the exposed interface and cause behavior that impacts availability. The confidentiality impact is limited, and integrity is not affected according to the vendor scoring. Because the attack surface is local, the vulnerability is most relevant in multi-app or multi-tenant contexts where untrusted code runs alongside privileged Bluetooth components.

Root Cause

The root cause is a missing or incorrect permission check within the Bluetooth module, consistent with [CWE-264]. A privileged operation is exposed to callers that should not hold access rights, allowing unauthorized invocation of the underlying functionality.

Attack Vector

Exploitation requires local access to the affected device. An attacker with the ability to execute code — for example, through an installed application — can call the unprotected Bluetooth interface without additional privileges or user interaction. The resulting condition can degrade Bluetooth service availability and expose limited data. No public proof-of-concept, exploit code, or CISA KEV listing exists for this issue at the time of publication.

No verified code examples are available for this vulnerability. Refer to the Huawei Security Bulletin for vendor-provided technical details.

Detection Methods for CVE-2026-58556

Indicators of Compromise

Unexpected Bluetooth service crashes, restarts, or resource exhaustion on affected devices
Unauthorized applications invoking Bluetooth APIs outside of documented permission scopes
Anomalous Bluetooth adapter state changes originating from unprivileged processes

Detection Strategies

Audit installed applications for calls to Bluetooth module interfaces that do not match the declared permission manifest
Monitor system logs for repeated failures or exceptions originating from the Bluetooth stack
Baseline normal Bluetooth process behavior and alert on deviation from expected caller identities

Monitoring Recommendations

Enable verbose logging for the Bluetooth subsystem to capture caller UID and API invocation details
Correlate Bluetooth service availability events with application install and execution telemetry
Track patch level compliance across the fleet against the July 2026 Huawei Security Bulletin

How to Mitigate CVE-2026-58556

Immediate Actions Required

Apply the security update referenced in the July 2026 Huawei Security Bulletin as soon as it is available for the affected device model
Restrict installation of untrusted applications on affected devices until patches are deployed
Inventory devices and confirm patch level against the vendor advisory

Patch Information

Huawei has addressed this vulnerability through the July 2026 monthly security update cycle. Consult the Huawei Security Bulletin for the specific firmware versions and device models that receive the fix.

Workarounds

Disable Bluetooth when not in use to reduce the exposed attack surface
Limit sideloading of applications and enforce application vetting through managed distribution channels
Apply mobile device management policies that restrict Bluetooth API access to trusted applications

bash

# Configuration example
# Refer to the Huawei Security Bulletin for vendor-specific mitigation steps
# https://consumer.huawei.com/en/support/bulletin/2026/7/