Security readout for executives and security teams
Plain-English summary
Synology DSM had a high-severity flaw that could expose credentials through SYNO.Core.Desktop.SessionData. A successful attack could let a remote attacker steal credentials, but the public record does not describe the exact method. Systems running DSM before 6.1.6-15266 should be treated as at risk.
Executive priority
Prioritize remediation for internet-reachable or business-critical DSM systems. Credential theft from storage administration platforms can lead to broader data access and operational disruption, even though the public sources do not confirm active exploitation.
Technical view
CVE-2018-8919 is a CWE-200 information exposure issue in Synology DiskStation Manager before 6.1.6-15266. CVSS 3.0 is 8.3 with network attack vector, high complexity, no privileges required, user interaction required, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Synology DSM deployments running versions before 6.1.6-15266. Risk is higher where DSM management access is reachable by untrusted networks or where DSM accounts have privileged access to stored data and services.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. The CVE states remote attackers may steal credentials via unspecified vectors, and CVSS indicates user interaction is required with high attack complexity.
Researcher notes
Evidence is sparse. Public details identify SYNO.Core.Desktop.SessionData and credential exposure, but do not specify the vectors. Treat exploitability conclusions cautiously beyond the CVSS vector and vendor advisory. No exploit code, KEV status, or confirmed exploitation is present in the supplied bundle.
Mitigation direction
- Upgrade Synology DSM to 6.1.6-15266 or later.
- Review Synology advisory Synology_SA_18_14 for product-specific guidance.
- Restrict DSM management access to trusted networks where feasible.
- Rotate DSM credentials if exposure or compromise is suspected.
- Review account privileges and remove unnecessary administrative access.
Validation and detection
- Inventory Synology DSM systems and record exact DSM versions.
- Flag any DSM version earlier than 6.1.6-15266.
- Identify DSM interfaces reachable from untrusted networks.
- Review DSM account activity for suspicious access around exposure windows.
- Confirm remediation status against Synology advisory Synology_SA_18_14.
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2018-8919 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/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.
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:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H1.66Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.3HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/security/advisory/Synology_SA_18_14CVE reference · x_refsource_CONFIRM
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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.