Security readout for executives and security teams
Plain-English summary
This NETGEAR router issue lets a highly privileged authenticated user inject commands on specific affected models. The business risk is highest where router administration is shared, weakly controlled, or exposed to untrusted local users. The source bundle does not show active exploitation.
Executive priority
Treat as a targeted remediation item for affected NETGEAR routers, not a broad emergency. Prioritize devices protecting offices or sensitive networks, and complete firmware validation because router compromise can undermine network trust.
Technical view
CVE-2021-38519 is a post-authentication command injection issue affecting listed NETGEAR router firmware versions before fixed releases. CVSS 3.1 is 6.3 with local attack vector, low complexity, high privileges required, no user interaction, and high confidentiality and integrity impact.
Likely exposure
Exposure is limited to the named NETGEAR models running firmware earlier than the listed fixed versions. Relevant environments include small offices, branch sites, and homes using these routers, especially where administrative access is broadly available.
Exploitation context
The bundle provides no CISA KEV listing and no cited evidence of active exploitation. Attack feasibility is constrained by the need for high privileges and local attack context, but successful abuse could compromise router control and sensitive traffic handling.
Researcher notes
The CVE record lists many models but the normalized affected field is not populated. The public evidence supports post-authentication command injection and fixed-version thresholds, but does not identify CWE, exploit details, or active exploitation.
Mitigation direction
- Install NETGEAR fixed firmware or later for each affected router model.
- Restrict router administration to trusted administrators and management networks.
- Review and remove unnecessary administrator accounts.
- Use strong unique router administrator credentials.
- Check NETGEAR advisory for any model-specific operational guidance.
Validation and detection
- Inventory NETGEAR router models and current firmware versions.
- Compare firmware against the affected-before versions in the CVE description.
- Confirm only trusted users can reach administrative interfaces.
- Review router configuration for unexpected administrator accounts or changes.
- Document patched, replaced, or still-exposed 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.
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-2021-38519 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AC:L/AV:L/A:L/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:3.1/AC:L/AV:L/A:L/C:H/I:H/PR:H/S:U/UI:N0.85.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AC:L/AV:L/A:L/C:H/I:H/PR:H/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000063762/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-PSV-2018-0564CVE reference · x_refsource_MISC
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.