Security readout for executives and security teams
Plain-English summary
An already authenticated user on the local or adjacent network could make vulnerable NETGEAR devices run unintended system commands. This can compromise router or extender configuration and traffic handling. The provided bundle does not show CISA KEV listing or active exploitation evidence.
Executive priority
Treat as a moderate network-edge device risk. Prioritize environments where NETGEAR administration is reachable by many users or unmanaged Wi-Fi clients, because successful abuse could affect network control and device integrity.
Technical view
CVE-2018-21114 is post-authentication command injection affecting specified NETGEAR routers, modem routers, and wireless extenders before listed 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.
Likely exposure
Exposure is limited to the named NETGEAR models running firmware older than the listed fixed thresholds. Risk is higher where device administration is reachable from untrusted local networks or shared Wi-Fi segments.
Exploitation context
The vulnerability requires an authenticated user with high privileges and adjacent-network access according to the provided CVSS vector. No public source in the bundle confirms active exploitation, exploit availability, or unauthenticated remote compromise.
Researcher notes
The source bundle gives affected models, firmware version thresholds, CVSS vector, and NETGEAR advisory reference. It does not provide CWE mapping, vulnerable endpoint details, exploit telemetry, or detailed remediation text beyond version-based affected ranges.
Mitigation direction
- Inventory NETGEAR models named in the CVE description.
- Compare installed firmware against the listed affected version thresholds.
- Update affected devices using NETGEAR’s security advisory guidance.
- Restrict device administration to trusted management networks.
- Review admin accounts and remove unnecessary access.
Validation and detection
- Confirm whether any listed NETGEAR models are deployed.
- Record firmware versions for each identified device.
- Verify management interfaces are not exposed to untrusted users.
- Check administrative user lists for unexpected accounts.
- Document remediation status against NETGEAR advisory 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-2018-21114 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/000060437/Security-Advisory-for-Post-Authentication-Command-Injection-on-Some-Routers-Modem-Routers-and-Wireless-Extenders-PSV-2017-0645CVE 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.