| Title | D-Link DIR-823X 250416 OS Command Injection |
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| Description | The D-Link DIR-823X router is vulnerable to a Remote Command Injection vulnerability via the /goform/set_filtering endpoint. This vulnerability exists in the backend function sub_4211C8. The root cause is an insufficient security validation of user-supplied parameters (ipaddr, macaddr, urladdr, and name).
By using the newline character (\n or 0x0A), an authenticated attacker can bypass a shallow blacklist filter to terminate an intended uci set command and execute arbitrary shell commands with root privileges. |
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| Source | ⚠️ https://github.com/master-abc/cve/issues/34 |
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| User | junqi (UID 93773) |
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| Submission | 02/04/2026 18:01 (6 months ago) |
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| Moderation | 02/08/2026 09:09 (4 days later) |
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| Status | Accepted |
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| VulDB entry | 344925 [D-Link DIR-823X 250416 /goform/set_filtering sub_4211C8 os command injection] |
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| Points | 20 |
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