CVE-2025-13392Known exploitationNetwork attack vector

Unauthenticated SSO bypass via enabled samlAuth mechanism

Published May 27, 2026 · Updated May 27, 2026

Authentication bypass in Synology DSM 7.2.2 before 7.2.2-72806-5 and 7.3 before 7.3.1-86003-1 allows remote attackers to access SSO with a known DN. The SYNOPAMSSO::samlAuth method permits authentication through a mechanism that should be disabled, accepting the supplied DN without normal authentication. Exploitation requires network access and prior knowledge of the target DN; the published record does not define the resulting account privileges.

CVSS severity8.1
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Synology DSM 7.2.2 before 7.2.2-72806-5 and 7.3 before 7.3.1-86003-1 allows remote attackers to access SSO with a known DN. The SYNOPAMSSO::samlAuth method permits authentication through a mechanism that should be disabled, accepting the supplied DN without normal authentication. Exploitation requires network access and prior knowledge of the target DN; the published record does not define the resulting account privileges.

The record

CVE
CVE-2025-13392
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Synology
Product
DiskStation Manager
Classifications
CWE-754, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.2.2 <7.2.2-72806-5
  2. Affected versionversion=7.3 <7.3.1-86003-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Synology · DiskStation Managerversion=7.2.2 <7.2.2-72806-5; version=7.3 <7.3.1-86003-1

Published CVSS scores

8.1SynologyCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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