Is this vulnerability remotely exploitable?

Yes. If an attacker can reach the router's management endpoint exposing `/boafrm/formUSSDSetup`, they can attempt remote exploitation by sending crafted `ussdValue` parameters, subject to any authentication barriers in place.

Does an attacker need authentication or local access?

In many realistic deployments, access to the USSD configuration endpoint is gated by the router's admin authentication. However, weak/default credentials, session fixation, CSRF scenarios, or misconfigurations that expose the interface to the internet can significantly reduce this barrier.

What is the safest general fix pattern for developers and vendors?

The most robust pattern is to eliminate direct shell usage for handling user-provided data: validate `ussdValue` against a strict allowlist of acceptable USSD formats, pass parameters as arguments to non-shell APIs, and encapsulate all command execution behind a minimal, well-defined interface that never concatenates user input into commands.

Severity:

HIGH RISK

(7.2)

Command Injection (CWE-77) in D-Link DWR-M921 USSD Configuration Endpoint

CVE-2026-2085

Published:

Feb 7, 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-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Command Injection

CWE:

CWE-74;CWE-77

Impact:

Remote Code Execution on Network Device

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Command Injection

CWE:

CWE-74;CWE-77

Impact:

Remote Code Execution on Network Device

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Command Injection (CWE-77) in D-Link DWR-M921 USSD Configuration Endpoint

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

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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