Security readout for executives and security teams
Plain-English summary
CVE-2019-20718 affects multiple NETGEAR routers and gateways. An already authenticated user on an adjacent network could trigger command injection, potentially taking over the device. The access requirements reduce likelihood, but compromise of a router can disrupt connectivity and expose traffic paths.
Executive priority
Treat this as a moderate-priority router maintenance issue. Prioritize business sites, shared offices, and remote-work environments using affected NETGEAR models, because router compromise can affect availability and network trust.
Technical view
The CVE describes post-authentication command injection in listed NETGEAR firmware versions. CVSS 3.0 is 6.8 with adjacent attack vector, low complexity, high privileges required, no user interaction, and high confidentiality, integrity, and availability impact. Fixed-version thresholds are provided in the CVE description and NETGEAR advisory.
Likely exposure
Exposure is limited to listed NETGEAR D-series and R-series devices running firmware below the specified fixed versions. Risk is higher where device administration is reachable by many users, shared networks, or untrusted local access.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability requires authenticated access and adjacent-network reachability, but successful abuse could execute commands on the affected device.
Researcher notes
Evidence is limited to the CVE record and NETGEAR advisory reference. The affected CPE data in the bundle is not populated, so validation should rely on exact model names and firmware thresholds from the description/advisory.
Mitigation direction
- Inventory listed NETGEAR models and firmware versions.
- Upgrade affected devices to NETGEAR advisory-fixed or later firmware.
- Restrict administrative access to trusted administrators and management networks.
- Disable unnecessary management exposure according to vendor guidance.
- Rotate device administrator credentials if compromise is suspected.
Validation and detection
- Compare firmware versions against each affected model threshold.
- Confirm upgraded firmware meets or exceeds the fixed version.
- Verify management access is limited to authorized administrators.
- Review device logs for unexpected administrator activity or configuration changes.
- Track the NETGEAR advisory for model-specific guidance.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-20718 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
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:L/AV:A/A:H/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:A/A:H/C:H/I:H/PR:H/S:U/UI:N0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061210/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-Gateways-PSV-2018-0195CVE 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.