Off-by-one error vulnerability in the transmission component in Synology Replication Service before 1.0.12-0066, 1.2.2-0353 and 1.3.0-0423 and Synology Unified Controller (DSMUC) before 3.1.4-23079 allows remote attackers to execute arbitrary code, potentially leading to a broader impact across the system via unspecified vectors.
This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 10.0, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 5 products from synology, from synology, from synology and 2 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2025, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2025-03-19T03:15:11.790
2026-01-16T16:50:48.027
Analyzed
CVSSv3.1: 10.0 (CRITICAL)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | synology | unified_controller | < 3.1.4-23079 | Yes |
| Application | synology | diskstation_manager_unified_controller | 3.1 | No |
| Application | synology | replication_service | ≤ 1.0.12-0066 | Yes |
| Operating System | synology | diskstation_manager | 6.2 | No |
| Application | synology | replication_service | < 1.2.2-0353 | Yes |
| Operating System | synology | diskstation_manager | 7.1 | No |
| Application | syncology | replication_service | < 1.3.0-0423 | Yes |
| Operating System | synology | diskstation_manager | 7.2 | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For synology's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.