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Description

Intelbras Router RF 301K firmware version 1.1.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to download router configuration files. Attackers can send a specific HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.cfg to retrieve sensitive router configuration without authentication.

PUBLISHED Reserved 2026-01-27 | Published 2026-01-28 | Updated 2026-01-29 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem types

Missing Authentication for Critical Function

Product status

firmware version 1.1.2
affected

Credits

Kaio Amaral finder

References

www.exploit-db.com/exploits/49126 exploit

www.exploit-db.com/exploits/49126 (ExploitDB-49126) exploit

www.intelbras.com/pt-br/ (Intelbras Official Homepage) product

www.vulncheck.com/...lbras-router-rf-k-authentication-bypass (VulnCheck Advisory: Intelbras Router RF 301K 1.1.2 - Authentication Bypass) third-party-advisory

cve.org (CVE-2020-36963)

nvd.nist.gov (CVE-2020-36963)

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