Security readout for executives and security teams
Plain-English summary
This issue means some Technicolor TC7200.d1I cable modem/router devices may expose Wi-Fi credentials through SNMP. If SNMP is reachable by an attacker, the wireless network password could be disclosed without normal administrative access. Public sources do not provide a CVSS score or confirmed vendor fix.
Executive priority
Prioritize environments where these devices protect business networks or shared Wi-Fi. The business risk is credential disclosure leading to unauthorized wireless access, but urgency depends on whether SNMP is exposed beyond trusted administration paths.
Technical view
CVE-2018-20443 describes remote discovery of Wi-Fi credentials on Technicolor TC7200.d1I devices with the listed firmware identifier through specific SNMP object requests. The source bundle does not include CVSS, CWE, complete CPE data, patch information, or confirmed affected-version ranges beyond the named device and firmware string.
Likely exposure
Exposure is most likely where affected Technicolor TC7200.d1I gateways have SNMP enabled and reachable from untrusted networks. Organizations should treat ISP-managed customer-premises equipment, branch routers, and legacy cable modem/router deployments as the main places to check.
Exploitation context
The CVE has a public reference describing credential discovery via SNMP. The bundle does not show CISA KEV listing or other cited evidence of active exploitation in the wild. Exploitability depends on SNMP reachability and device configuration.
Researcher notes
Evidence is sparse: the CVE record names the device, firmware identifier, SNMP vector, and Wi-Fi credential impact, but lacks scoring and remediation data. Avoid broad product conclusions without confirming device model, firmware, and SNMP accessibility in the target environment.
Mitigation direction
- Check Technicolor or ISP guidance for firmware updates or replacement options.
- Disable SNMP management where it is not operationally required.
- Restrict SNMP access to trusted management networks only.
- Block untrusted inbound SNMP traffic at perimeter controls.
- Rotate Wi-Fi credentials if exposure is confirmed or cannot be ruled out.
Validation and detection
- Inventory Technicolor TC7200.d1I devices and record firmware identifiers.
- Confirm whether SNMP is enabled on each candidate device.
- Verify SNMP is not reachable from WAN or guest networks.
- Review network controls for restrictions on SNMP access.
- Document whether vendor or ISP remediation is available.
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.
CVE-2018-20443 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://misteralfa-hack.blogspot.com/2018/12/technicolor-passwords-wireless-via-snmp.htmlCVE reference · x_refsource_MISC
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.