Security readout for executives and security teams
Plain-English summary
This issue affects NETGEAR ReadyNAS OS 6 devices running versions before 6.8.0. It is a stored cross-site scripting flaw, meaning malicious content could be saved in the device interface and later run in another user's browser. The available source data indicates moderate risk, not emergency-level risk.
Executive priority
Treat this as a targeted remediation item for legacy NAS infrastructure. Prioritize if ReadyNAS administration is accessible to many users or the device stores sensitive business data.
Technical view
CVE-2017-18820 is stored XSS in NETGEAR ReadyNAS OS 6 before 6.8.0. The CVSS 3.0 vector is 5.2 with local attack vector, high privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations still operating NETGEAR ReadyNAS OS 6 devices below version 6.8.0. The source bundle does not identify specific models, deployment patterns, or internet exposure.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation would require the conditions reflected in CVSS: high privileges, user interaction, and local attack vector.
Researcher notes
Available evidence is sparse: no CWE is listed, no model list is provided in the bundle, and no exploitation evidence is cited. Analysis should stay anchored to ReadyNAS OS 6 versions before 6.8.0.
Mitigation direction
- Upgrade affected ReadyNAS OS 6 devices to version 6.8.0 or later where supported.
- Review the NETGEAR advisory for model-specific update guidance.
- Limit access to ReadyNAS administrative interfaces to trusted administrators.
- Retire or isolate devices that cannot be updated.
Validation and detection
- Inventory NETGEAR ReadyNAS OS 6 devices in the environment.
- Confirm each device is running ReadyNAS OS 6.8.0 or later.
- Identify any devices below 6.8.0 for remediation tracking.
- Check whether ReadyNAS administrative interfaces are reachable only by trusted users.
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.
CVE-2017-18820 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
- Medium
- CVSS
- 5.2 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:L/A:L/C:L/I:L/PR:H/S:C/UI:R
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/AC:L/AV:L/A:L/C:L/I:L/PR:H/S:C/UI:R1.13.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.2MediumVector: CVSS:3.0/AC:L/AV:L/A:L/C:L/I:L/PR:H/S:C/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000049045/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-ReadyNAS-devices-PSV-2017-0266CVE 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.