PatchTheCVECVE-2026-18188: A format string vulnerability was found in the Rsync Backup on the ADM
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Routine
HIGH 8.1UPGRADE
CVE-2026-18188 is a high-severity flaw (CVSS 8.1) affecting data master. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A format string vulnerability was found in the Rsync Backup on the ADM. The vulnerability occurs because user-controlled rsync backup configuration or log data may be processed through an unsafe format string operation. An authenticated attacker can exploit this issue to disclose memory information or cause denial of service of the affected backup component. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RUN1 as well as
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 61%) |
| CISA exploited list | No |
| Weakness | CWE-134 |
| Published | 2026-07-30 |
| Last modified | 2026-10-23 |
Publisher (CNA): ASUSTOR, Inc. · Vendor: asustor
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
asustor data master UPGRADE
Affected: >= 4.1.0.rhu2 and <= 4.3.3.run1 · >= 5.0.0.ra82 and < 5.1.4.rjv2
Fixed in: 5.1.4.rjv2
Safe to downgrade to: a release before 4.1.0.rhu2
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Related CVEs
- CVE-2026-67248 HIGH 8.8 UPGRADE A stack-based buffer overflow vulnerability was found in the File Explorer on the ADM
- CVE-2026-18186 HIGH 8.1 UPGRADE A stored format string vulnerability was found in the FTP Backup on the ADM
- CVE-2026-18187 HIGH 8.1 UPGRADE A format string vulnerability was found in the Internal Backup on the ADM
- CVE-2026-67244 HIGH 7.2 UPGRADE A format string vulnerability was found in the Notification OAuth settings of ADM
- CVE-2026-67245 HIGH 8.1 UPGRADE A path traversal vulnerability was found in the VPN Clients on the ADM