CVE-2026-6274 Overview
CVE-2026-6274 is an authentication weakness affecting DTS Electronics Industry and Trade Ltd. Co. Redline WR3200 wireless routers. The flaw combines improper authentication, missing authentication for a critical function, and weak authentication controls [CWE-287]. Attackers can reach functionality that is not properly constrained by access control lists (ACLs) over the network. The issue affects Redline WR3200 firmware from version 7.1.3 up to but not including 7.1.8. Successful exploitation grants unauthorized access to sensitive router functions, compromising confidentiality, integrity, and availability of the device and traffic transiting it.
Critical Impact
Unauthenticated remote attackers can access protected router functions, enabling configuration tampering, traffic interception, and persistent device compromise.
Affected Products
- DTS Electronics Redline WR3200 firmware 7.1.3
- DTS Electronics Redline WR3200 firmware versions after 7.1.3 and before 7.1.8
- Network deployments exposing the router management interface
Discovery Timeline
- 2026-06-05 - CVE-2026-6274 published to NVD
- 2026-06-08 - Last updated in NVD database
Technical Details for CVE-2026-6274
Vulnerability Analysis
The Redline WR3200 exposes critical administrative functionality without enforcing proper authentication checks. The device fails to validate caller identity before executing privileged operations, allowing network-adjacent attackers to invoke management endpoints directly. The condition is classified under [CWE-287] Improper Authentication and extends to missing authentication on critical functions and reliance on weak credential validation.
Because the attack vector is network-based and requires no privileges or user interaction, exploitation can be performed remotely against any exposed management interface. Compromise of a router at this layer permits adversaries to alter DNS, routing, and firewall rules, intercept LAN traffic, pivot into internal networks, and establish persistence in firmware-resident configurations.
Root Cause
The root cause is the absence of enforced authentication on functionality that should be restricted by ACLs. Sensitive endpoints accept requests without verifying session validity, credentials, or origin. Weak authentication primitives further reduce the effort needed to access protected functions when challenges are present but bypassable.
Attack Vector
An attacker sends crafted HTTP or service-protocol requests to the router's management interface from any network position that can reach it. No prior account, token, or user interaction is required. Devices with WAN-exposed administration are reachable directly from the internet, while LAN-only deployments remain exploitable by any host on the local network, including compromised IoT endpoints.
A proof-of-concept reference is published on GitHub. See the GitHub PoC for CVE-2026-6274 and the Siber Güvenlik Notification TR-26-0321 for technical details.
Detection Methods for CVE-2026-6274
Indicators of Compromise
- Unexpected configuration changes to DNS, firewall, port-forwarding, or VPN settings on Redline WR3200 devices.
- Unsolicited HTTP requests to administrative URIs originating from external or unusual internal hosts.
- New or modified administrative accounts on the router that were not provisioned by operators.
- Firmware integrity mismatches against vendor-supplied 7.1.8 or later builds.
Detection Strategies
- Inspect router access logs for requests to management endpoints lacking valid session identifiers or originating from unauthorized subnets.
- Compare current device configuration against a known-good baseline at regular intervals to surface unauthorized changes.
- Monitor DNS resolver and default gateway settings on connected clients for unexpected modifications consistent with router compromise.
Monitoring Recommendations
- Forward router syslog data to a centralized SIEM and alert on authentication failures, configuration writes, and reboots.
- Track outbound connections from the router itself to detect command-and-control traffic from compromised firmware.
- Apply network segmentation monitoring to identify lateral movement attempts originating from the router VLAN.
How to Mitigate CVE-2026-6274
Immediate Actions Required
- Upgrade Redline WR3200 firmware to version 7.1.8 or later as published by DTS Electronics.
- Disable WAN-side access to the router management interface until patching is complete.
- Rotate all administrative credentials and pre-shared keys on affected devices after upgrade.
- Audit configuration for unauthorized changes introduced prior to remediation.
Patch Information
DTS Electronics resolves CVE-2026-6274 in Redline WR3200 firmware version 7.1.8. Operators running any release in the 7.1.3 through pre-7.1.8 range must update. Refer to the Siber Güvenlik Notification TR-26-0321 for vendor-coordinated guidance.
Workarounds
- Restrict management interface access to a dedicated administrative VLAN with ACLs at the upstream switch or firewall.
- Block inbound traffic to router management ports from untrusted networks at the perimeter.
- Place affected devices behind a network access control layer that enforces authentication before reaching the router.
- Replace devices that cannot be updated to 7.1.8 with supported hardware.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
