Use Rsync and ASUSTOR to Build Reliable Offsite Backups

Sudden power outages, hardware failures, and natural disasters can all bring a business’s operations to a standstill. Without a robust backup strategy, data recovery can be time-consuming, costly, or even impossible. This leads to interruptions in business operations.

 

With built-in Rsync support on ASUSTOR NAS devices, businesses can automatically synchronize data to a remote location, establishing a secure and efficient offsite backup mechanism and enhancing data protection capabilities. 

What is Rsync?

 

Rsync is an open source data synchronization technology widely used in enterprise environments. Through an incremental synchronization mechanism, it only transmits the modified portions of files, rather than copying all data at once every time.

 

This helps businesses:

• Reduce backup time
• Improve synchronization efficiency
• Maintain real-time updates of remote backup data

It is particularly suitable for environments that require frequent data updates and large file sizes.

• High-Efficiency Incremental Backup: Only modified data is synchronized, effectively reducing network load and backup time.
• Secure Remote Synchronization: Supports SSH encrypted transmission, ensuring the security of data during transfer.
• Automated Backup Scheduling: Allows the creation of regular backup tasks, reducing manual management overhead and improving backup consistency.
• Flexible Deployment: ASUSTOR NAS devices support both Rsync Server and Client modes, allowing businesses to create diverse backup architectures as needed.

Built for Business Continuity 

Linux Kernel (Fragnesia)

 

"Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel. If the vulnerability is exploited, it allows an authenticated local user with standard privileges to gain the root permissions.

• CVE-2026-46300 affects certain ASUSTOR products that have installed VPN server through App Central and have Linux kernel versions higher than 4.11 and ADM versions ranging from 4.1 to 5.1. Updates with Linux Kernel Patch in ADM will be released as soon as possible.
• Linux Kernel Patch has been updated on ADM 5.1.3.RI81 to resolve the issues.

Nginx

 

F5 Networks has issued the security advisory, pointing out that the Nginx web server, which uses an asynchronous event-driven framework, has a security vulnerability, CVE-2026-42945, which occurs in the ngx_http_rewrite_module component.

 

F5 Networks announced multiple security vulnerabilities that have been fixed in the latest release of Nginx 1.30.1.

 

CVE-2026-42945, CVE-2026-42946, CVE-2026-40701, CVE-2026-42934 and CVE-2026-40460 will affect ASUSTOR products with Nginx 1.18 or 1.24 installed.

• Nginx 1.30.1 has been updated on ADM 5.1.3.RI81 to resolve the issues.

Linux Kernel (ssh-keysign-pwn)

 

A vulnerability was found in the Linux kernel that allows a local unprivileged attacker to read root-owned files. The vulnerability arises from a race condition during process termination, enabling a brief window where sensitive data, such as SSH host private keys or /etc/shadow contents, can be disclosed.

• CVE-2026-46333 could lead to unauthorized access to sensitive information on affected certain ASUSTOR Products with Linux kernel versions higher than 5.10 and ADM versions ranging from 4.1 to 5.1. Updates with Linux Kernel Patch will be released as soon as possible.
• Linux Kernel Patch has been updated on ADM 5.1.3.RI81 to resolve the issues.

Rsync

 

The Rsyn team announced multiple vulnerabilities that have been fixed in the latest release of Rsyn.

 

CVE-2026-29518, CVE-2026-43617, CVE-2026-43618 and CVE-2024-12084 affected ASUSTOR products with from ADM 4.1 to ADM 5.1. Updates with Rsyn 3.4.3 will be released as soon as possible.

• Rsync package has been updated to version 3.4.3 on ADM 5.1.3.RI81 to resolve the issues.

The Lockerstor 2 Gen2+ has earned PCMag’s Editors’ Choice Award for its powerful hardware and exceptional expansion flexibility, making it an ideal dual-bay NAS for 4K streaming, high-speed file sharing, and professional backups. Featuring dual 5GbE ports with SMB multichannel, it delivers combined speeds of up to 10 Gbps, while four built-in M.2 NVMe slots provide versatile options for caching or independent high-speed storage. Designed with future security in mind, it also supports PQC-ready encryption and WORM technology to safeguard critical data against emerging cyber threats and unauthorized tampering.