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Critical · 9.6 Public exploit CVE-2020-35391 EUVD-2020-23065GHSA-mfx7-787g-3rp3

Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a dir…

Published Jan 1, 2021 · Updated Aug 4, 2024 · Assigned by mitre

Description

Tenda N300 F3 12.01.01.48 devices allow remote attackers to obtain sensitive information (possibly including an http_passwd line) via a direct request for cgi-bin/DownloadCfg/RouterCfm.cfg, a related issue to CVE-2017-14942. NOTE: the vulnerability report may suggest that either a ? character must be placed after the RouterCfm.cfg filename, or that the HTTP request headers must be unusual, but it is not known why these are relevant to the device's HTTP response behavior.

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

GitHub 3 repositories

  • dumitory-dev/CVE-2020-35391-POC ★ 4 · Feb 5, 2023

    Tenda N300 Authentication Bypass via Malformed HTTP Request Header

  • 4d000/Tenda-F3-V4 ★ 3 · Mar 2, 2025

    Python script to exploit CVE-2020-35391 on Tenda F3 V3/V4 routers, enabling unauthorized download of configuration, flash, and syslog files.

  • H454NSec/CVE-2020-35391 ★ 2 · Mar 9, 2023

    Tenda f3 Malformed HTTP Request Header Processing Vulnerability.

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References