Security readout for executives and security teams
Plain-English summary
NETGEAR RAX40 routers running firmware earlier than 1.0.3.64 are affected by an authentication bypass. For a business, the concern is unauthorized access to a network edge device, with potential confidentiality, integrity, and availability impact. The public bundle does not include exploit details or confirmed active exploitation.
Executive priority
Treat as a priority remediation for any deployed RAX40 routers, especially in offices, branches, or exposed Wi-Fi environments. The impact rating is critical, but urgency depends on whether affected devices exist and whether untrusted users can reach them locally.
Technical view
CVE-2019-20642 describes an authentication bypass affecting NETGEAR RAX40 devices before 1.0.3.64. The CVSS 3.0 score is 9.0, with adjacent-network attack vector, low complexity, low privileges, no user interaction, changed scope, and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to NETGEAR RAX40 devices running firmware older than 1.0.3.64. CVSS indicates the attacker must have adjacent-network reachability. The source bundle does not identify other affected NETGEAR models, services, or configurations.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source confirms active exploitation. The public details support high theoretical impact but do not provide enough evidence to assess real-world exploitation prevalence.
Researcher notes
Available public data is sparse. The CVE record and NETGEAR advisory identify product, version boundary, and vulnerability class, but do not include root cause, affected endpoint, proof of concept, or exploitation telemetry. Avoid extrapolating beyond RAX40 before 1.0.3.64.
Mitigation direction
- Identify all NETGEAR RAX40 devices in the environment.
- Check each device firmware version against 1.0.3.64.
- Upgrade affected RAX40 devices to 1.0.3.64 or later if vendor-supported.
- Review NETGEAR advisory for model-specific update instructions.
- Restrict router administration to trusted local networks where possible.
Validation and detection
- Confirm inventory contains no RAX40 firmware older than 1.0.3.64.
- Verify updated devices report firmware 1.0.3.64 or later.
- Check whether RAX40 management interfaces are reachable from untrusted adjacent networks.
- Review logs for unexpected administration activity where logging is available.
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-2019-20642 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
- Critical
- CVSS
- 9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:C/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:A/A:H/C:H/I:H/PR:L/S:C/UI:N2.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9CriticalVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:C/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061500/Security-Advisory-for-Authentication-Bypass-on-RAX40-PSV-2019-0266CVE 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.