How to fix CVE-2025-53477?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Is Null Pointer Dereference affected by CVE-2025-53477?

CVE-2025-53477 presents notable security risk, a null pointer dereference vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments. A patch is available and should be applied as part of regular vulnerability management.

CVE-2025-53477

HIGH

2026-01-10 [email protected]

7.5

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

Patch Released

Jan 14, 2026 - 17:38 nvd

Patch available

CVE Published

Jan 10, 2026 - 10:15 nvd

HIGH 7.5

Description

NULL Pointer Dereference vulnerability in Apache Nimble. Missing validation of HCI connection complete or HCI command TX buffer could lead to NULL pointer dereference. This issue requires disabled asserts and broken or bogus Bluetooth controller and thus severity is considered low. This issue affects Apache NimBLE: through 1.8.0. Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Analysis

NULL Pointer Dereference vulnerability in Apache Nimble. Missing validation of HCI connection complete or HCI command TX buffer could lead to NULL pointer dereference. [CVSS 7.5 HIGH]

Technical Context

Classified as CWE-476 (NULL Pointer Dereference). Affects Nimble. NULL Pointer Dereference vulnerability in Apache Nimble.

Missing validation of HCI connection complete or HCI command TX buffer could lead to NULL pointer dereference.

This issue requires disabled asserts and broken or bogus Bluetooth controller and thus severity is considered low.

This issue affects Apache NimBLE: through 1.8.0.

Users are recommended to upgrade to version 1.9.0, which fixes the issue.

Affected Products

Vendor: Apache. Product: Nimble.

Remediation

A vendor patch is available — apply it immediately. Update to version 1.9.0 or later. Restrict network access to the affected service where possible.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.3

CVSS: +38

POC: 0

CVE-2025-53477 vulnerability details – vuln.today

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CVE-2025-53477

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CVE-2025-53477

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Lifecycle Timeline

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