CVE-2026-40538

Published Sep 18, 2026 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
An improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to read limited files via brute-force attacks.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Synology
Synology diskstation Manager
Vendors & Products Synology
Synology diskstation Manager
Type Values Removed Values Added
Title Improper Restriction of Excessive Authentication Attempts Enables Brute‑Force File Access in Synology DSM
Type Values Removed Values Added
Title Improper Restriction of Excessive Authentication Attempts Enables Brute‑Force File Access in Synology DSM
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An improper restriction of excessive authentication attempts vulnerability in Auto block in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to read limited files via brute-force attacks.
Weaknesses CWE-307
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
synology
Published
Updated
Sep 18, 2026, 10:42 AM
Reserved
Apr 14, 2026, 1:01 AM
Status
Awaiting Analysis
Published
Sep 18, 2026, 9:16 AM
Modified
Sep 18, 2026, 7:07 PM