Security readout for executives and security teams
Plain-English summary
Some NETGEAR switches had missing internal permission checks. On vulnerable firmware, someone with local access and high privileges could reach functions they should not, potentially exposing or changing sensitive switch settings. This is important for network reliability, but the published data does not support internet-wide or unauthenticated exploitation.
Executive priority
Treat as a moderate network infrastructure hygiene issue. It does not show confirmed active exploitation in the provided sources, but vulnerable switches can protect important segmentation and operations, so firmware remediation should be scheduled and tracked.
Technical view
CVE-2019-20676 is missing function-level access control in listed NETGEAR switch firmware. CVSS v3.0 is 6.0 with local attack vector, high privileges required, no user interaction, high confidentiality and integrity impact, and no availability impact. The public data names affected models and firmware thresholds, but not endpoints, exploit details, or CWE mapping.
Likely exposure
Exposure is limited to the NETGEAR switch models listed in the CVE description running firmware older than the fixed versions. Risk is highest where switch management is reachable by administrators, shared IT workstations, or other local privileged users.
Exploitation context
The source bundle does not show CISA KEV listing or any cited active exploitation. The CVSS vector indicates exploitation requires local access and high privileges, so this is not described as remotely exploitable or unauthenticated in the provided sources.
Researcher notes
The CVE record lacks CWE, CPE, endpoint, and exploit detail. Analysis should stay model/version driven. The key technical signal is missing function-level access control with PR:H and AV:L, making validation dependent on firmware inventory and management-plane exposure.
Mitigation direction
- Identify listed NETGEAR switch models in production and lab networks.
- Upgrade affected devices to the fixed firmware versions named by NETGEAR.
- Restrict management access to trusted administrative networks only.
- Review vendor advisory guidance before applying operational changes.
- Prioritize switches supporting sensitive segmentation or critical infrastructure.
Validation and detection
- Inventory switch model names and current firmware versions.
- Compare each device against the CVE's affected version thresholds.
- Confirm management interfaces are not broadly reachable.
- Check change records for firmware updates after April 2020.
- Document devices that remain below fixed firmware versions.
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-2019-20676 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/000061463/Security-Advisory-for-Missing-Function-Level-Access-Control-on-Some-Switches-PSV-2018-0542CVE 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.