| Title | D-Link DWR-M921 V1.1.50 Command Injection |
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| Description | During a security review of the D-Link DWR-M921 router firmware, a critical command injection vulnerability was identified in the USSD configuration endpoint `/boafrm/formUSSDSetup`. The vulnerability exists within the `sub_419F20` function. This function retrieves the user-controlled parameter `ussdValue` and uses `sprintf` to inject it directly into a system command string associated with the `at-mngr` utility. The resulting string is passed to the `system()` function without sufficient sanitization of single quotes, allowing authenticated attackers to break out of the command structure and execute arbitrary OS commands with root privileges. |
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| Source | ⚠️ https://github.com/LX-66-LX/cve-new/issues/1 |
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| User | LX-66-LX (UID 92717) |
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| Submission | 01/24/2026 15:36 (8 months ago) |
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| Moderation | 02/06/2026 09:20 (13 days later) |
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| Status | Accepted |
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| VulDB entry | 344652 [D-Link DWR-M921 1.1.50 USSD Configuration Endpoint /boafrm/formUSSDSetup sub_419F20 ussdValue command injection] |
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| Points | 20 |
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