Security readout for executives and security teams
Plain-English summary
This CVE covers a NETGEAR security misconfiguration affecting specific router and extender models before listed firmware versions. The score is medium, but confidentiality impact is high if exploited. Business urgency depends on whether these legacy devices still exist in production, branch, home-office, or guest-network environments.
Executive priority
Treat this as a targeted remediation item, not an emergency. Prioritize environments where these devices bridge sensitive networks, support remote work, or remain unmanaged. Replace or update affected devices during the next network maintenance cycle.
Technical view
CVE-2018-21229 is an incorrect security-configuration issue in NETGEAR R7500v2, R7800, WN3000RPv3, WNDR4300v2, and WNDR4500v3 firmware below specified versions. CVSS 3.0 is 5.3 with adjacent-network attack vector, high attack complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is limited to organizations running the named NETGEAR models below the fixed firmware versions. The CVSS vector indicates adjacent-network exposure, not broad remote internet exposure. The source bundle does not identify affected CPEs or a specific vulnerable service.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. The CVSS vector suggests exploitation requires adjacent network access and high complexity. No public exploit status is established in the supplied evidence.
Researcher notes
The evidence is sparse: no CWE, no detailed root cause, no named vulnerable endpoint, and no exploit confirmation. Analysis should stay anchored to the vendor advisory and CVSS vector. Avoid assuming internet-reachable exploitation or broader NETGEAR product impact.
Mitigation direction
- Inventory the named NETGEAR models across offices, branches, labs, and remote-user networks.
- Upgrade R7500v2 to firmware 1.0.3.20 or later.
- Upgrade R7800 to firmware 1.0.2.38 or later.
- Upgrade WN3000RPv3 to firmware 1.0.2.50 or later.
- Upgrade WNDR4300v2 and WNDR4500v3 to firmware 1.0.0.50 or later.
- Check NETGEAR advisory PSV-2016-0124 for vendor-specific guidance.
Validation and detection
- Confirm whether any affected NETGEAR model is still deployed.
- Record each device model and installed firmware version.
- Compare installed firmware against the fixed versions listed in the CVE.
- After updating, verify the firmware version shown on each device.
- Document devices that cannot be updated and escalate replacement decisions.
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-2018-21229 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AC:H/AV:A/A:N/C:H/I:N/PR:N/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:N/C:H/I:N/PR:N/S:U/UI:N1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AC:H/AV:A/A:N/C:H/I:N/PR:N/S:U/UI:N
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.netgear.com/000055105/Security-Advisory-for-Security-Misconfiguration-on-Some-Routers-and-Extenders-PSV-2016-0124CVE 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.