Is this vulnerability remotely exploitable over the internet?

It can be, but only if the Telnet port on the router is exposed to the internet or to an attacker-controlled network. In many deployments, Telnet is reachable only from the local network; however, misconfigurations, port forwarding, or ISP-managed setups can make it externally accessible.

What level of access does an attacker need to exploit this?

An attacker must be able to reach the router's Telnet interface over the network. Once they have network connectivity to that port and knowledge of the hard-coded credentials (which may be obtainable from public exploit code), they can attempt to authenticate and gain elevated access.

What is the safest general fix pattern for this issue?

The safest pattern is to remove reliance on any embedded, non-user-controlled credentials and to disable Telnet completely in favor of secure management channels that require unique, administrator-set passwords or keys. Device designs should ensure that no static, vendor-controlled secrets are used for runtime authentication.

Severity:

HIGH RISK

(8.1)

Hard-Coded Telnet Credentials (CWE-259/CWE-798) in Tenda AX12 Pro V2 Router

CVE-2026-1610

Published:

Jan 29, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Hard-Coded Credentials / Insecure Authentication

CWE:

CWE-259;CWE-798

Impact:

Authentication Bypass and Device Compromise

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Hard-Coded Credentials / Insecure Authentication

CWE:

CWE-259;CWE-798

Impact:

Authentication Bypass and Device Compromise

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

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Hard-Coded Telnet Credentials (CWE-259/CWE-798) in Tenda AX12 Pro V2 Router

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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