Security readout for executives and security teams
Plain-English summary
CVE-2019-20663 is a stored cross-site scripting issue in some NETGEAR Orbi WiFi systems. Affected firmware can retain malicious script content, creating risk to confidentiality and integrity. The known affected models are RBR50, RBS50, and RBK50 before firmware 2.3.5.30.
Executive priority
Prioritize remediation during normal vulnerability maintenance, escalating if these devices manage sensitive networks or cannot be centrally controlled. The issue has high confidentiality and integrity impact, but the CVSS vector indicates high privileges and local access are required.
Technical view
The CVE describes stored XSS affecting NETGEAR RBR50, RBS50, and RBK50 firmware before 2.3.5.30. CVSS 3.0 score is 6.0 with local attack vector, low complexity, high privileges required, no user interaction, and high confidentiality and integrity impact.
Likely exposure
Exposure is most likely where affected NETGEAR Orbi RBR50, RBS50, or RBK50 devices remain on firmware earlier than 2.3.5.30. The provided CVE data does not identify broader product families or CPEs.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, exploit code, or public exploitation evidence. Treat this as a firmware hygiene and management-plane risk unless vendor or threat intelligence sources indicate otherwise.
Researcher notes
Evidence is limited to the CVE record and NETGEAR advisory reference. The affected product field in the bundle is generic, but the description names RBR50, RBS50, and RBK50 before 2.3.5.30. No CWE is supplied.
Mitigation direction
- Upgrade RBR50, RBS50, and RBK50 firmware to 2.3.5.30 or later.
- Review the NETGEAR advisory for device-specific upgrade guidance.
- Restrict administrative access to trusted management networks and accounts.
- Remove or replace affected devices that cannot be updated.
Validation and detection
- Inventory NETGEAR Orbi RBR50, RBS50, and RBK50 devices.
- Confirm each device firmware version is below or at least 2.3.5.30.
- Document any devices that cannot be verified from management records.
- Recheck vendor guidance for model-specific advisories or superseding firmware.
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-2019-20663 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
- 6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:L/A:N/C:H/I:H/PR:H/S:U/UI:N
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:N/C:H/I:H/PR:H/S:U/UI:N0.85.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6MediumVector: CVSS:3.0/AC:L/AV:L/A:N/C:H/I:H/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061476/Security-Advisory-for-Stored-Cross-Site-Scripting-on-Some-WiFi-Systems-PSV-2018-0559CVE 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.