CVE-2026-0414: NETGEAR Router Auth Bypass Vulnerability

CVE-2026-0414 Overview

CVE-2026-0414 is an insufficient input validation vulnerability affecting selected NETGEAR router models. The flaw allows an authenticated administrator connected to the local network to make unauthorized modifications to router software and functionality. The weakness is classified under [CWE-94] Improper Control of Generation of Code (Code Injection).

Exploitation requires both administrative credentials and adjacent network access, which limits the attack surface. However, a successful attacker can alter device behavior on the targeted router. NETGEAR disclosed the issue in its June 2026 Security Advisory.

Critical Impact
An authenticated administrator on the local network can inject or alter code paths on the router, undermining the integrity of router software and configuration.

Affected Products

NETGEAR routers listed in the NETGEAR June 2026 Security Advisory
NETGEAR RBE970 (referenced in vendor materials) — see the NETGEAR RBE970 Support Page
Specific firmware versions are not enumerated in the NVD record

Discovery Timeline

2026-06-09 - CVE-2026-0414 published to NVD
2026-06-10 - Last updated in NVD database
2026-06-11 - EPSS score calculated at 0.023% (percentile 6.861)

Technical Details for CVE-2026-0414

Vulnerability Analysis

The vulnerability stems from insufficient input validation within administrative interfaces of the affected NETGEAR routers. Input supplied by an authenticated administrator is not adequately sanitized before being incorporated into operations that influence router software or functionality. This aligns with [CWE-94], where attacker-influenced input affects code generation or execution paths.

Because the attack vector is adjacent (local network only) and high privileges are required, exploitation is restricted to attackers who already control or have compromised administrator credentials. The impact, when achieved, is on the integrity of the device. Confidentiality and availability are not directly affected per the published vector.

Root Cause

The root cause is missing or incomplete validation of administrator-supplied input on management endpoints. Inputs that should be treated as data are processed in a manner that permits modification of router software or behavior, allowing code injection conditions to arise.

Attack Vector

An attacker must be connected to the same local network segment as the router and authenticate as an administrator. From this position, the attacker submits crafted input through an administrative interface. The router processes the input without adequate validation, enabling unauthorized modification of router functionality.

No verified exploit code is publicly available for CVE-2026-0414.
Refer to the NETGEAR June 2026 Security Advisory for technical details.

Detection Methods for CVE-2026-0414

Indicators of Compromise

Unexpected changes to router configuration files, firmware components, or service binaries on affected NETGEAR models
Administrator sessions originating from unusual internal IP addresses or at unusual hours
Unrecognized scripts, startup entries, or scheduled tasks introduced through the admin interface

Detection Strategies

Compare current router firmware checksums and configuration exports against a known-good baseline
Review router administrative logs for input that contains shell metacharacters, encoded payloads, or unusually long parameter values
Correlate administrative logins with downstream changes to system files or running services

Monitoring Recommendations

Forward router syslog and admin event logs to a centralized logging or SIEM platform for retention and analysis
Alert on configuration changes outside approved change windows
Monitor LAN segments for unauthorized devices attempting to reach the router management interface

How to Mitigate CVE-2026-0414

Immediate Actions Required

Apply the firmware update referenced in the NETGEAR June 2026 Security Advisory for each affected model
Rotate administrator credentials and disable any unused administrative accounts
Restrict administrative access to a dedicated management VLAN or trusted host list

Patch Information

NETGEAR published fixed firmware as part of its June 2026 Security Advisory. Administrators should consult the advisory for the specific model and firmware version that remediates CVE-2026-0414, then upgrade through the router's standard firmware update process. The NVD record does not list affected version ranges directly, so the vendor advisory is authoritative.

Workarounds

Disable remote management features that are not strictly required
Enforce strong, unique administrator passwords and enable multi-factor authentication where supported
Segment the local network so that only authorized hosts can reach the router's management interface

bash

# Example: restrict router admin interface access at the network layer
# (apply on an upstream firewall or managed switch ACL)
allow tcp from 192.0.2.10/32 to <router_mgmt_ip> port 443
deny  tcp from any         to <router_mgmt_ip> port 443