Security readout for executives and security teams
Plain-English summary
This CVE affects certain NETGEAR routers and gateways where a logged-in user could trigger command injection. In business terms, a compromised or low-privilege device account on an exposed management network could lead to device takeover and disruption.
Executive priority
Treat as a high-priority network edge maintenance issue where affected models are present. The main urgency is preventing authenticated local users or compromised credentials from turning device management access into command execution.
Technical view
CVE-2019-20711 is post-authentication command injection affecting NETGEAR D3600 before 1.0.0.76, D6000 before 1.0.0.76, and XR500 before 2.3.2.32. CVSS 3.0 is 7.1 with adjacent-network access, high attack complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to environments using the named NETGEAR models on vulnerable firmware, especially where device administration is reachable from shared, guest, or poorly segmented local networks.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The vulnerability requires authentication and adjacent-network access according to the CVSS vector, which reduces broad internet exposure but remains serious on weakly controlled LANs.
Researcher notes
The source bundle identifies affected models, fixed version thresholds, CVSS vector, and vendor advisory. It does not provide CWE mapping, detailed vulnerable endpoints, exploit proof, or active exploitation evidence. Avoid assuming broader NETGEAR impact beyond the listed devices.
Mitigation direction
- Upgrade D3600 and D6000 firmware to 1.0.0.76 or later.
- Upgrade XR500 firmware to 2.3.2.32 or later.
- Restrict router management access to trusted administrative networks.
- Review NETGEAR advisory for model-specific guidance before operational changes.
- Rotate device administrative credentials if compromise is suspected.
Validation and detection
- Inventory NETGEAR D3600, D6000, and XR500 devices.
- Record firmware versions and compare against affected version thresholds.
- Confirm management interfaces are not reachable from untrusted local segments.
- Review device logs for unexpected administrative access or configuration changes.
- Verify upgrade completion and preserve evidence of 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.
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-2019-20711 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
- 7.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:H/AV:A/A:H/C:H/I:H/PR:L/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:L/S:U/UI:N1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.1HighVector: CVSS:3.0/AC:H/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000061217/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-and-Gateway-PSV-2018-0336CVE 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.