| Title | UTT HiPER 520 nv520v3v1.7.7-160105 Command Injection |
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| Description | Technical Summary: A critical OS command injection vulnerability was identified in the UTT HiPER 520 router (firmware nv520v3v1.7.7-160105). The vulnerability is located in the sub_44EFB4 function of the rehttpd binary, which handles requests to the /goform/formReleaseConnect endpoint.
Vulnerability Detail: The application uses websGetVar to retrieve the Isp_Name parameter. Although the program logic attempts to process this input, it fails to properly sanitize the string before passing it to a doSystem call (via sub_4407D4). Due to this insecure handling, an authenticated attacker can inject arbitrary shell commands using metacharacters (e.g., ;).
Exploit Proof: As demonstrated in the PoC, sending a POST request to /goform/formReleaseConnect with the payload delstr=&id=&Isp_Name=1;touch /tmp/2026-1-29&Isp_Type= results in the execution of the touch command on the underlying Linux system with root privileges. This confirms the ability to execute arbitrary code. |
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| Source | ⚠️ https://github.com/cha0yang1/UTT520CVE/blob/main/UTTRCE2.md |
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| User | Ruler-Chovy (UID 95098) |
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| Submission | 02/07/2026 11:30 (3 months ago) |
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| Moderation | 02/20/2026 09:00 (13 days later) |
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| Status | Accepted |
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| VulDB entry | 347083 [UTT HiPER 520 1.7.7-160105 Web Management Interface formReleaseConnect sub_44EFB4 Isp_Name os command injection] |
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| Points | 20 |
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