| Title | D-Link DIR-823X 250416 OS Command Injection |
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| Description | The D-Link DIR-823X router is susceptible to a Remote Command Injection vulnerability via the /goform/set_qos endpoint. The flaw exists in the backend function sub_420688, which fails to adequately filter the newline character (\n or 0x0A) when handling parameters such as qqos_enable, qqos_max_download, and qqos_max_upload. An authenticated attacker can inject arbitrary shell commands by using a newline to terminate the intended UCI configuration command and initiate a malicious instruction, which is then executed with root privileges. |
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| Source | ⚠️ https://github.com/master-abc/cve/issues/29 |
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| User | 942384053 (UID 94603) |
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| Submission | 01/27/2026 16:03 (3 months ago) |
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| Moderation | 02/06/2026 22:08 (10 days later) |
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| Status | Accepted |
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| VulDB entry | 344777 [D-Link DIR-823X 250416 /goform/set_qos sub_420688 os command injection] |
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| Points | 20 |
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