Security readout for executives and security teams
Plain-English summary
Synology DSM has a high-severity SSO authentication-bypass flaw. A remote attacker with prior knowledge of a distinguished name could bypass authentication on affected builds, potentially compromising confidentiality, integrity, and availability. Synology identifies fixed DSM builds; the bundle does not show active exploitation.
Executive priority
Treat as priority patching for Synology DSM assets that support business operations or store sensitive data. The issue can bypass authentication, but available evidence points to high attack complexity and no confirmed active exploitation in the supplied sources.
Technical view
CVE-2025-13392 is a CWE-754 improper exceptional-condition handling issue in DSM SSO. It affects DSM before 7.2.2-72806-5 and 7.3.1-86003-1, with 7.2.1-69057 listed as not affected. CVSS 8.1 reflects network reachability, no privileges, no user interaction, and high impact, but high attack complexity.
Likely exposure
Organizations running Synology DiskStation Manager in the affected 7.2.2 or 7.3 branches are the main concern, especially where DSM SSO is reachable over a network. DSM 7.2.1-69057 is specifically listed as not affected.
Exploitation context
The advisory title links the issue to PWN2OWN 2025, indicating public research disclosure. The provided sources do not state in-the-wild exploitation, and the CVE bundle says KEV is false. Attack requires prior knowledge of the distinguished name, raising complexity.
Researcher notes
Focus on version/build accuracy and SSO exposure. The key precondition is prior DN knowledge. Do not assume all DSM 7.2.1 systems are affected because 7.2.1-69057 is explicitly excluded. Evidence for exploit maturity is limited to PWN2OWN advisory context.
Mitigation direction
- Upgrade DSM to 7.2.2-72806-5 or later where applicable.
- Upgrade DSM 7.3 deployments to 7.3.1-86003-1 or later.
- Confirm whether Synology lists any branch-specific guidance for your devices.
- Limit DSM and SSO exposure to trusted networks where operationally possible.
- Monitor Synology advisory updates for revised affected versions or mitigations.
Validation and detection
- Inventory Synology DSM devices and record exact version and build.
- Identify deployments using DSM SSO functionality.
- Compare builds against Synology’s affected and fixed version statements.
- Verify DSM 7.2.1-69057 systems are not incorrectly flagged as vulnerable.
- Review authentication logs for unusual SSO access patterns.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-754: Exact CWE lookup
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Open ATT&CK lookupCVE-2025-13392 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9synologyVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Synology-SA-25:14 DSM (PWN2OWN 2025)CVE reference, synology · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.