Security readout for executives and security teams
Plain-English summary
CVE-2019-20690 is an authentication bypass issue in several NETGEAR routers and gateways. If an affected device runs older firmware, an attacker on an adjacent network path may be able to bypass authentication and compromise confidentiality, integrity, and availability. The source bundle does not show known active exploitation.
Executive priority
Treat this as a high-priority legacy network-device cleanup item. It is not currently evidenced as actively exploited in the supplied sources, but authentication bypass on routers can create broad business risk if affected devices remain in use.
Technical view
The CVE describes authentication bypass affecting NETGEAR D6200, D7000, R6020, R6080, R6120, R6220, WNR2020, and WNR614 below specified firmware versions. CVSS 3.0 is 7.5 high, with adjacent-network attack vector, no privileges or user interaction, high impact, and high attack complexity.
Likely exposure
Exposure is likely where listed NETGEAR devices remain deployed with firmware earlier than the fixed versions. Risk is most relevant around network-adjacent access to the device rather than broad internet exposure, based on the CVSS adjacent-network vector.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. The vulnerability was published in April 2020 and updated in August 2024, so legacy deployed devices are the practical concern.
Researcher notes
The CVE record lacks CWE detail and lists generic affected CPE metadata, but the description provides model and version thresholds. Analysis should stay tied to NETGEAR’s advisory and the named firmware boundaries. No exploit mechanism is provided in the source bundle.
Mitigation direction
- Inventory the listed NETGEAR router and gateway models across home, branch, and lab networks.
- Upgrade affected devices to the non-affected firmware versions or later identified by NETGEAR.
- Check the NETGEAR advisory for model-specific firmware availability and installation guidance.
- Retire devices that cannot be brought to a non-affected firmware version.
Validation and detection
- Confirm whether any deployed device model matches the CVE description.
- Record current firmware versions and compare them with the CVE’s affected version thresholds.
- Verify upgraded devices report firmware at or above the NETGEAR fixed version.
- Review network asset records for unmanaged or legacy NETGEAR devices.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-20690 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
- 7.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:H/AV:A/A:H/C:H/I:H/PR:N/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:H/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/AC:H/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061449/Security-Advisory-for-Authentication-Bypass-on-Some-Routers-and-Gateways-PSV-2018-0073CVE 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.