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
This vulnerability (CWE-134) involves the use of externally-controlled format strings in the FTP Backup component of ASUSTOR ADM. User-supplied backup configuration data is written into task logs and later processed unsafely with format string operations, enabling an authenticated attacker to potentially leak memory contents or crash the CGI process, leading to denial of service. The issue affects ADM versions 4.1.0 to 4.3.3.RUN1 and 5.0.0 to 5.1.3.RI81. The CVSS 4.0 score is 7.1 (high severity), reflecting network attack vector, low complexity, no user interaction, and high impact on availability.
Potential Impact
An authenticated attacker can exploit this vulnerability to disclose sensitive memory information or cause a denial of service by crashing the affected CGI process. This may impact system stability and confidentiality of information processed by the FTP Backup task logs.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to the FTP Backup feature to trusted users only and monitor for unusual CGI process crashes.
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
ASUSTOR Inc.
ADM
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-134) involves the use of externally-controlled format strings in the FTP Backup component of ASUSTOR ADM. User-supplied backup configuration data is written into task logs and later processed unsafely with format string operations, enabling an authenticated attacker to potentially leak memory contents or crash the CGI process, leading to denial of service. The issue affects ADM versions 4.1.0 to 4.3.3.RUN1 and 5.0.0 to 5.1.3.RI81. The CVSS 4.0 score is 7.1 (high severity), reflecting network attack vector, low complexity, no user interaction, and high impact on availability.
Potential Impact
An authenticated attacker can exploit this vulnerability to disclose sensitive memory information or cause a denial of service by crashing the affected CGI process. This may impact system stability and confidentiality of information processed by the FTP Backup task logs.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to the FTP Backup feature to trusted users only and monitor for unusual CGI process crashes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ASUSTOR1
- Date Reserved
- 2026-07-29T01:38:48.878Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a6ac37f9c2644c7f872b188
Added to database: 07/30/2026, 03:22:39 UTC
Last enriched: 08/06/2026, 13:58:41 UTC
Last updated: 09/14/2026, 04:50:06 UTC
Views: 39
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.