CVE-2026-18186: CWE-134 Use of Externally-Controlled format string in ASUSTOR Inc. ADM
A stored format string vulnerability was found in the FTP Backup on the ADM. The vulnerability occurs because user-controlled backup configuration data may be written into a task log and later 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 CGI process. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RUN1 as well as from ADM 5.0.0 through ADM 5.1.3.RI81.
AI Analysis
Technical Summary
CVE-2026-18186 is a CWE-134 (Use of Externally-Controlled Format String) vulnerability in ASUSTOR Inc.'s ADM FTP Backup feature. The vulnerability occurs because user-controlled backup configuration data is stored in task logs and later processed through an unsafe format string operation, allowing an authenticated attacker to potentially disclose memory contents or cause a denial of service in the CGI process handling the logs. Affected versions include ADM 4.1.0 through 4.3.3.RUN1 and 5.0.0 through 5.1.3.RI81. No official patch or remediation level has been provided as of the publication date.
Potential Impact
An authenticated attacker can exploit this vulnerability to disclose sensitive memory information or cause a denial of service condition in the affected CGI process, potentially disrupting service availability or leaking information that could aid further attacks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the FTP Backup feature to trusted users only and monitor for unusual activity related to task logs. Avoid exposing the affected CGI process to untrusted networks.
CVE-2026-18186: CWE-134 Use of Externally-Controlled format string in ASUSTOR Inc. ADM
Description
A stored format string vulnerability was found in the FTP Backup on the ADM. The vulnerability occurs because user-controlled backup configuration data may be written into a task log and later 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 CGI process. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RUN1 as well as from ADM 5.0.0 through ADM 5.1.3.RI81.
CVSS v4.0
Score 7.1high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18186 is a CWE-134 (Use of Externally-Controlled Format String) vulnerability in ASUSTOR Inc.'s ADM FTP Backup feature. The vulnerability occurs because user-controlled backup configuration data is stored in task logs and later processed through an unsafe format string operation, allowing an authenticated attacker to potentially disclose memory contents or cause a denial of service in the CGI process handling the logs. Affected versions include ADM 4.1.0 through 4.3.3.RUN1 and 5.0.0 through 5.1.3.RI81. No official patch or remediation level has been provided as of the publication date.
Potential Impact
An authenticated attacker can exploit this vulnerability to disclose sensitive memory information or cause a denial of service condition in the affected CGI process, potentially disrupting service availability or leaking information that could aid further attacks.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the FTP Backup feature to trusted users only and monitor for unusual activity related to task logs. Avoid exposing the affected CGI process to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ASUSTOR1
- Date Reserved
- 2026-07-29T01:38:48.878Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6ac37f9c2644c7f872b188
Added to database: 07/30/2026, 03:22:39 UTC
Last enriched: 07/30/2026, 03:39:15 UTC
Last updated: 07/30/2026, 21:35:00 UTC
Views: 7
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