CVE-2020-36963Public exploitNetwork attack vector

Configuration disclosure via unauthenticated download endpoint

Published Jan 28, 2026 · Updated Jan 28, 2026

Authentication bypass in Intelbras RF 301K firmware 1.1.2 allows remote attackers to download sensitive router configuration. The DownloadCfg CGI endpoint returns RouterCfm.cfg for a direct HTTP GET request without checking authentication. Network access to the router's HTTP service is sufficient; the request reads configuration data without altering settings or interrupting service.

CVSS severity8.7
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Intelbras RF 301K firmware 1.1.2 allows remote attackers to download sensitive router configuration. The DownloadCfg CGI endpoint returns RouterCfm.cfg for a direct HTTP GET request without checking authentication. Network access to the router's HTTP service is sufficient; the request reads configuration data without altering settings or interrupting service.

The record

CVE
CVE-2020-36963
Published
Jan 28, 2026
Updated
Jan 28, 2026
Vendor
Intelbras
Product
RF 301K
Classifications
CWE-306, CAPEC-36, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=firmware version 1.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Intelbras · RF 301Kversion=firmware version 1.1.2

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-36Using Unpublished Interfaces or Functionality
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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