Security readout for executives and security teams
Plain-English summary
Synology DSM had a log export weakness where CSV archive export could allow arbitrary content injection. The business concern is mainly around trusted or high-privilege DSM users and downstream handling of exported logs, not broad unauthenticated takeover based on the supplied evidence.
Executive priority
Treat as a moderate maintenance and governance item. Prioritize remediation for internet-accessible or broadly administered DSM systems, especially where exported logs are used in reporting or operational workflows.
Technical view
CVE-2018-8920 is CWE-116 improper neutralization of escape sequences in DSM Log Exporter before 6.1.6-15266. The CVSS 3.0 vector is network-reachable, low complexity, high privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Organizations running Synology DiskStation Manager before 6.1.6-15266 are potentially exposed. Exposure is most relevant where high-privilege users can export DSM logs as CSV archives or where exported CSV files feed downstream workflows.
Exploitation context
The source bundle does not identify CISA KEV listing or active exploitation. The public description states arbitrary content injection through CSV archive export with unspecified impact, so real-world exploitation detail is incomplete.
Researcher notes
The affected component is DSM Log Exporter, with injection during CSV archive export. The available CVE text does not define the injected content type, execution context, or precise impact, so validation should focus on version exposure and privilege boundaries.
Mitigation direction
- Upgrade Synology DSM to 6.1.6-15266 or later where applicable.
- Review Synology advisory SA-18-14 for vendor-confirmed remediation details.
- Restrict DSM administrative and log export privileges to trusted users.
- Limit DSM management access to trusted networks or VPN access.
- Handle exported CSV logs cautiously in downstream tools.
Validation and detection
- Inventory Synology DSM devices and record exact DSM versions.
- Confirm whether any devices run DSM before 6.1.6-15266.
- Identify users with permissions to export DSM logs.
- Review operational workflows that open or ingest exported CSV logs.
- Check vendor advisory SA-18-14 against deployed DSM versions.
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
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CWE-116: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2018-8920 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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:L/PR:H/UI:R/S:C/C:L/I:L/A:L1.73.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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.
Improper Encoding or Escaping of Output
Improper Encoding or Escaping of Output represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.