CVE-2026-0416: NETGEAR RAXE450/RAXE500 Input Validation Flaw (MEDIUM)

Technical summary

CVE-2026-0416 is an insufficient input validation flaw (CWE-20) in NETGEAR RAXE450 and RAXE500 firmware. The vulnerability allows an authenticated administrator with local network access to craft input that circumvents management interface validation checks, leading to unauthorized modification of protected router software or operational parameters. The CVSS 3.1 score is 4.5 (MEDIUM severity) with the vector CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N, indicating adjacent network attack vector, high privilege requirement, and integrity impact without confidentiality or availability loss.

Business impact

Router compromise can degrade network security and availability for the organization. An attacker with admin credentials could alter firewall rules, DNS settings, SSL/TLS interception points, or firmware behavior to enable persistent monitoring, traffic redirection, or further lateral movement within the network. For organizations relying on these NETGEAR models as edge security appliances, the integrity violation could undermine trust in network access controls and create compliance reporting obligations depending on industry or regulatory context.

Affected systems

NETGEAR RAXE450 and RAXE500 Wi-Fi 6 routers and their corresponding firmware versions are affected. RAXE450 and RAXE500 are mid-to-enterprise segment mesh systems commonly deployed in business networks for coverage and performance. Confirm your specific firmware version against NETGEAR's advisory to determine exposure; typically, models released or updated before the patch announcement are at higher risk.

Exploitability

Exploitation requires authenticated administrator access and local network connectivity—a relatively high bar. The vulnerability does not enable remote unauthenticated attack or privilege escalation from a lower-level account. However, in shared or mixed-trust network environments, compromised or rogue admin credentials present a real risk. Once authenticated, no additional user interaction is needed to craft the malicious input, making the attack straightforward for an insider or attacker who has obtained admin credentials through phishing, credential reuse, or lateral movement.

Remediation

Apply the security patch released by NETGEAR for your specific router model (RAXE450 or RAXE500) immediately. Verify the patched firmware version in NETGEAR's security advisory or product release notes. Additionally, enforce strong, unique administrator passwords; limit local network access via segmentation where possible; regularly audit admin account activity; and consider disabling remote management if not required. Rotate any compromised credentials and review configuration logs for unauthorized changes to router settings post-discovery.

Patch guidance

Check NETGEAR's official support portal or security advisory for the latest firmware version available for your RAXE450 or RAXE500 model. Download firmware only from official sources to avoid supply-chain risk. Before patching production devices, test in a non-critical environment if feasible. Apply patches during scheduled maintenance windows to avoid service interruption. Reboot the router after firmware installation to ensure the update is fully activated. Document the patching action and timestamp in your asset and change management systems.

Detection guidance

Monitor router management interface logs for unusual authentication patterns, failed login attempts, or admin account access from unexpected IP addresses or times. Inspect syslog or router audit trails for configuration changes made by admin accounts, particularly modifications to firewall rules, DHCP settings, or DNS configurations. Network-based detection is challenging because the vulnerability operates within the authenticated admin interface; rely on host and log analysis. If available, enable enhanced logging on the management interface and review logs regularly for anomalies. After patching, baseline system behavior and alert on deviations.

Why prioritize this

Although the CVSS score is MEDIUM (4.5), prioritize patching because the vulnerability directly compromises router integrity—a critical network control point. Routers are foundational to network trust and visibility; their compromise can undermine broader security investments. The requirement for admin credentials limits immediate risk, but business environments should assume periodic credential compromise and treat router hardening as essential. Patch within standard maintenance windows but do not defer indefinitely.

Risk score, explained

The CVSS 3.1 score of 4.5 (MEDIUM) reflects the high privilege requirement (PR:H), local/adjacent network attack vector (AV:A), and focus on integrity impact (I:H) without confidentiality or availability loss in the base case. However, contextual risk is higher: routers are high-value targets, and integrity compromise on network infrastructure can have cascading effects. Organizations should treat this as a priority fix even though it does not meet critical thresholds.

Frequently asked questions