Security readout for executives and security teams
Plain-English summary
CVE-2026-0406 affects NETGEAR Nighthawk XR1000v2 routers. A user already connected to the router’s LAN could abuse insufficient input validation to run operating-system commands on the device. This is not described as internet-exploitable in the provided sources, but compromise of a router can affect network trust and traffic handling.
Executive priority
Treat as a timely remediation item for any deployed XR1000v2 routers, especially in shared or less-controlled LAN environments. It is medium severity and not reported as actively exploited, but router compromise can have outsized operational impact.
Technical view
The issue is CWE-20 insufficient input validation leading to OS command injection on NETGEAR XR1000v2. CVSS v4.0 is 6.1, medium, with adjacent-network access, low complexity, low privileges, and high confidentiality, integrity, and availability impact to the vulnerable system. Affected version data is limited in the source bundle.
Likely exposure
Exposure appears limited to NETGEAR XR1000v2 devices reachable from the local LAN by an authenticated or low-privileged user. Organizations using this model in offices, labs, retail, or remote sites should verify firmware status. The provided data does not indicate WAN exploitation.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The vulnerability requires LAN proximity or access and low privileges, reducing broad internet risk. However, successful command injection on a router can give an attacker strong control over that device.
Researcher notes
Public details are sparse. The CVE identifies command injection via insufficient input validation, but does not name a specific endpoint, parameter, or fixed firmware version in the provided bundle. Avoid assuming other NETGEAR models are affected without vendor confirmation.
Mitigation direction
- Check NETGEAR’s January 2026 advisory for the fixed firmware guidance.
- Update XR1000v2 firmware using NETGEAR’s official support page.
- Restrict LAN access to trusted users and managed devices.
- Limit router administration access to authorized administrators only.
- Monitor NETGEAR advisories for revised affected-version details.
Validation and detection
- Inventory whether NETGEAR XR1000v2 devices are deployed.
- Record current firmware versions from device management interfaces.
- Compare installed firmware with NETGEAR’s advisory and support page.
- Confirm untrusted users cannot access the router’s LAN.
- Review logs for unusual router configuration or management activity.
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.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-0406 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
- 6.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/V:D/RE:M/U:Amber
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:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/V:D/RE:M/U:Amber——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.1MediumVector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/V:D/RE:M/U:Amber
Source materials
- CVE List V5 sourceCVE List V5
- https://www.netgear.com/support/product/xr1000v2CVE reference · product, patch
- https://kb.netgear.com/000070442/January-2026-NETGEAR-Security-AdvisoryCVE reference · vendor-advisory
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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.