| 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_upnp endpoint. The flaw exists in the backend function sub_420618, which fails to adequately filter the newline character (\n or 0x0A) when handling the upnp_enable parameter.
An authenticated attacker can inject arbitrary shell commands by using a newline to terminate the intended UCI configuration command and initiate a malicious instruction. These commands are subsequently executed with root privileges. |
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| Source | ⚠️ https://github.com/master-abc/cve/issues/31 |
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| User | jiefengliang (UID 93721) |
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| Submission | 01/30/2026 11:40 (3 months ago) |
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| Moderation | 02/07/2026 15:58 (8 days later) |
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| Status | Accepted |
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| VulDB entry | 344876 [D-Link DIR-823X 250416 /goform/set_upnp sub_420618 upnp_enable os command injection] |
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| Points | 20 |
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