External risk intelligence

Synology BeeStation OS Remote Code Execution Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2025-12686

A buffer overflow vulnerability in Synology BeeStation OS allows remote attackers to execute arbitrary code. This could lead to unauthorized access and potential data compromise for affected organizations. The realistic business risk involves a breach of system integrity and confidentiality.

4Halo Surface Signal

Buffer Overflow

Synology Beestation Os

1.0 to before 1.3.2

External exposure likelihood

Halo Surface Signal score for CVE-2025-12686

The vulnerability affects Synology BeeStation OS, a network-attached storage and personal cloud solution designed to be accessed remotely over the internet. As an appliance management interface frequently exposed to facilitate remote file access and administration, it is commonly reachable from the public internet in typical deployment scenarios.

Horizon Alert

Summary of the vulnerability and why it matters

A buffer copy vulnerability exists in Synology BeeStation OS. This flaw allows remote attackers to execute arbitrary code. The potential business impact could involve unauthorized system access and data compromise.

  • Affects Synology BeeStation OS.
  • Allows remote arbitrary code execution.
  • Can lead to data compromise.

Attack Path

How an attacker could exploit the issue

A buffer overflow vulnerability exists in the AdminCenter of Synology BeeStation OS. This allows remote attackers to execute arbitrary code. The vulnerability is triggered through unspecified vectors within the affected operating system. Exploitation could lead to a compromise of the system.

  • External network exposure required.
  • Unauthenticated remote attacker access.
  • Trigger via unspecified vectors for code execution.

Live Threat

Current exploitation, exposure, and threat context

A critical vulnerability has been identified in Synology BeeStation OS, impacting systems prior to version 1.3.2-65648. This flaw allows remote attackers to execute arbitrary code by exploiting a buffer overflow. The potential for widespread compromise necessitates a careful review of affected systems. This situation presents a significant risk to organizations using the affected Synology products.

  • Low attacker skill level needed.
  • No access or conditions required.
  • High business risk and urgency.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows remote attackers to execute arbitrary code due to a buffer overflow in the AdminCenter. Organizations should prioritize identifying all instances of the affected operating system and taking steps to limit potential network exposure. Once these actions are complete, applying the vendor-provided update and verifying its successful implementation is crucial.

  • Identify affected assets.
  • Reduce exposure or isolate risk.
  • Fix, verify, and monitor.

Frequently asked questions

What is the 'Classic Buffer Overflow' vulnerability affecting Synology BeeStation OS?

A buffer copy without checking the size of the input, known as a 'Classic Buffer Overflow' (CWE-120), exists in the AdminCenter of Synology BeeStation OS before version 1.3.2-65648. This flaw permits remote attackers to execute arbitrary code through unspecified vectors.

How can an attacker exploit the Synology BeeStation OS vulnerability?

Remote attackers can exploit this buffer overflow vulnerability in Synology BeeStation OS by leveraging unspecified vectors within the AdminCenter. The vulnerability allows for arbitrary code execution, potentially leading to a full system compromise.

What is the business impact of the Synology BeeStation OS vulnerability?

The Synology BeeStation OS vulnerability poses a significant risk due to its potential for remote arbitrary code execution. This could lead to unauthorized system access, data breaches, and a widespread compromise of sensitive information.

What is the relevance of Synology BeeStation OS vulnerability CVE-2025-12686?

This vulnerability is highly relevant as it affects Synology BeeStation OS, a solution often exposed to the internet for remote access and administration. The critical severity (CVSS 9.8) and the ability for unauthenticated remote attackers to execute arbitrary code present a substantial threat. Halo classifies this as an external threat due to its network attack vector.

What steps should be taken to address the Synology BeeStation OS vulnerability?

Organizations should first identify all affected Synology BeeStation OS assets. Next, reduce potential network exposure by isolating or restricting access to affected systems. Finally, apply the vendor-provided update to version 1.3.2-65648 or later, and then verify the successful implementation of the patch.

References