Security readout for executives and security teams
Plain-English summary
Intelbras RF 301K routers running firmware 1.1.2 can expose their configuration file to someone who is not logged in. That file may contain sensitive network settings or secrets. The issue is high risk for internet-facing devices, but the provided sources do not show confirmed active exploitation.
Executive priority
Prioritize remediation for internet-facing or branch routers. The business risk is disclosure of network configuration and possible credentials, which can support follow-on intrusion. Treat as urgent if affected devices are externally reachable.
Technical view
CVE-2020-36963 is a CWE-306 missing authentication issue in Intelbras Router RF 301K firmware 1.1.2. An unauthenticated network attacker can retrieve the router configuration file via an HTTP request. CVSS 4.0 score is 8.7, driven by network reachability, low complexity, no privileges, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is most likely where Intelbras RF 301K routers on firmware 1.1.2 have their web management interface reachable from untrusted networks. Internal-only devices still matter if attackers gain LAN access.
Exploitation context
A public ExploitDB entry is referenced, indicating public exploit information exists. CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation in the wild.
Researcher notes
The source bundle names only Intelbras Router RF 301K firmware 1.1.2. No patch version, workaround, or vendor advisory details are provided beyond the Intelbras homepage. The CVE record and VulnCheck advisory should be monitored for updates.
Mitigation direction
- Identify Intelbras RF 301K routers and firmware versions.
- Restrict router management access to trusted administrative networks.
- Disable internet exposure of the router web interface where possible.
- Check Intelbras guidance for firmware updates or vendor remediation.
- Rotate credentials or secrets that may be present in exposed configuration files.
Validation and detection
- Confirm whether any RF 301K devices run firmware 1.1.2.
- Verify management interfaces are not reachable from the internet.
- Review web logs for unexpected configuration download requests.
- Assess whether downloaded configurations contain reusable credentials or sensitive network data.
- Track CVE and vendor sources for updated remediation guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-306: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-36963 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49126CVE reference · exploit
- Intelbras Official HomepageCVE reference · product
- VulnCheck Advisory: Intelbras Router RF 301K 1.1.2 - Authentication BypassCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authentication for Critical Function
Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.