Security readout for executives and security teams
Plain-English summary
CVE-2019-20746 is a reflected cross-site scripting issue in certain NETGEAR routers, gateways, WiFi systems, and extenders. It could let an attacker influence what a logged-in user sees or does in the device web interface. The CVSS score is 4.3, so this is a moderate maintenance and exposure-reduction issue, not an emergency based on provided evidence.
Executive priority
Schedule remediation through normal network device maintenance, prioritizing devices used for business connectivity or reachable from shared networks. The available evidence supports moderate urgency: patch or isolate affected devices, but do not treat this as a confirmed active-exploitation incident from the provided sources.
Technical view
The CVE describes reflected XSS affecting named NETGEAR devices before specific firmware versions. CVSS 3.0 is 4.3 with adjacent attack vector, low complexity, high privileges required, user interaction required, changed scope, low confidentiality and integrity impact, and no availability impact. No CWE detail or exploit mechanics are provided in the source bundle.
Likely exposure
Exposure is limited to organizations running the named NETGEAR models below the fixed firmware versions: D3600, D6000, D7800, DM200, R7800, R8900, R9000, RBK/RBR/RBS 20/40/50, WN3000RPv2/v3, WN3100RPv2, WNDR4300v2, WNDR4500v3, and WNR2000v5.
Exploitation context
The source bundle does not show active exploitation, and KEV status is false. The CVSS vector indicates adjacent-network access, high privileges, and user interaction are required. Treat this primarily as a device management-plane hardening issue unless NETGEAR or other cited sources report exploitation.
Researcher notes
Evidence is sparse: the bundle names affected models and firmware thresholds, but does not provide endpoint details, CWE mapping, proof-of-concept status, or vendor mitigation text beyond the advisory reference. Avoid assuming internet exploitability because the CVSS vector is adjacent network and requires user interaction.
Mitigation direction
- Inventory NETGEAR devices against the models listed in the CVE description.
- Upgrade affected devices to the listed firmware version or later.
- Restrict device administration interfaces to trusted management networks.
- Disable unnecessary remote administration where vendor settings allow it.
- Check NETGEAR advisory guidance for model-specific update instructions.
- Retire affected devices that cannot receive supported firmware.
Validation and detection
- Confirm each device model and firmware version from administrative records or the device UI.
- Compare installed firmware against the CVE's affected-before version list.
- Verify management interfaces are not reachable from untrusted networks.
- Review patch records for the NETGEAR advisory identifier PSV-2018-0252.
- Document any unsupported devices requiring replacement or compensating controls.
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-2019-20746 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
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:N/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:A/A:N/C:L/I:L/PR:H/S:C/UI:R1.22.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/AC:L/AV:A/A:N/C:L/I:L/PR:H/S:C/UI:R
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000060973/Security-Advisory-for-Reflected-Cross-Site-Scripting-on-Some-Routers-Gateways-and-WiFi-Systems-PSV-2018-0252CVE 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.