CVE-2022-27625 is a critical remote code execution vulnerability in Synology DiskStation Manager (DSM), specifically affecting the message processing functionality of the Out-of-Band (OOB) Management feature. The root cause is an improper restriction of operations within the bounds of a memory buffer, classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer). This type of vulnerability typically leads to buffer overflow or memory corruption, enabling attackers to execute arbitrary commands remotely without authentication or user interaction. The vulnerability affects multiple Synology NAS models, including DS3622xs+, FS3410, and HD6500, running DSM versions prior to 7.1.1-42962-2. The CVSS v3.1 base score is 10.0, indicating a critical severity with network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and a scope change (S:C) that impacts confidentiality, integrity, and availability (C:H/I:H/A:H). Although no public exploits are currently known, the vulnerability's nature and severity make it a high-value target for attackers aiming to compromise NAS devices remotely. The OOB Management feature, designed for remote device management, expands the attack surface, making exploitation feasible over the network. Given the criticality and the potential for full system compromise, this vulnerability represents a significant threat to organizations relying on Synology NAS devices for data storage and management.

European organizations using affected Synology NAS models are at high risk of severe consequences if this vulnerability is exploited. The potential impacts include complete compromise of NAS devices, leading to unauthorized access to sensitive data, disruption of business operations due to device unavailability, and potential lateral movement within corporate networks. Given that NAS devices often store critical backups and shared files, exploitation could result in data breaches, data loss, and operational downtime. The lack of required authentication and user interaction lowers the barrier for attackers, increasing the likelihood of exploitation. For sectors such as finance, healthcare, and government within Europe, where data protection regulations like GDPR impose strict requirements, a breach could lead to significant legal and financial repercussions. Additionally, the critical infrastructure and enterprises relying on Synology NAS for storage and remote management could face operational disruptions, impacting service delivery and trust.

Organizations should immediately verify if they use any of the affected Synology NAS models (DS3622xs+, FS3410, HD6500) running DSM versions prior to 7.1.1-42962-2. The primary mitigation step is to upgrade DSM to version 7.1.1-42962-2 or later, where the vulnerability is patched. If immediate patching is not feasible, organizations should disable the Out-of-Band Management feature to reduce the attack surface. Network-level mitigations include restricting access to management interfaces via firewall rules, allowing only trusted IP addresses or VPN connections. Monitoring network traffic for unusual activity targeting NAS devices and implementing intrusion detection systems can help detect exploitation attempts. Regularly auditing NAS device configurations and applying principle of least privilege for management access further reduce risk. Additionally, organizations should maintain up-to-date backups stored offline or in isolated environments to recover from potential compromise.