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Synology DSM EUVDEUVD-2026-82775

| CVE-2026-13635 MEDIUM
Improper Encoding or Escaping of Output (CWE-116)
2026-09-18 synology GHSA-j6x3-5xfr-hc7h
5.3
CVSS 3.1 · Vendor: synology
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Severity by source

Vendor (synology) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
5.3 MEDIUM

Network-reachable Auth API, no auth or interaction (PR:N/UI:N/AC:L); impact limited to disclosure of non-sensitive data (C:L, I:N/A:N), scope unchanged.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (synology).

CVSS VectorVendor: synology

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Sep 18, 2026 - 09:16 EUVD
Analysis Generated
Sep 18, 2026 - 09:14 vuln.today

DescriptionCVE.org

An improper encoding or escaping of output vulnerability in Auth API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to obtain non-sensitive information.

AnalysisAI

Improper encoding and escaping of output in the Auth API of Synology DiskStation Manager (DSM) lets remote, unauthenticated attackers retrieve information the vendor classifies as non-sensitive, affecting deployments before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, 5.3) confirms exploitation needs no credentials, no user interaction, and no non-default configuration, so the only meaningful barrier is impact rather than access. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Exploit
technique details hidden
Execution
technique details hidden
Impact
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Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation is possible against default configurations of Synology DiskStation Manager (DSM) with a network-reachable Auth API on versions before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Low-priority despite the medium 5.3 CVSS. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Vendor-released patch: upgrade DSM to 7.2.1-69057-12 or later, 7.2.2-72806-9 or later, 7.3.2-86009-4 or later, or 7.4-90075 or later, as documented in Synology advisory SA_26_13 (https://www.synology.com/en-global/security/advisory/Synology_SA_26_13); DSM updates can be applied through Control Panel > Update & Restore, and appliances that cannot be immediately updated should at minimum be moved onto the nearest fixed build within their existing release train. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-82775 vulnerability details – vuln.today

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