Security readout for executives and security teams
Plain-English summary
This CVE describes a Technicolor DPC3928SL cable gateway exposing Wi-Fi credentials through SNMP requests. If reachable by an attacker, the device could disclose wireless passwords, enabling unauthorized network access. Public records do not provide CVSS, CPE data, or confirmed patch details.
Executive priority
Prioritize this for networks that still run the affected gateway or expose SNMP beyond trusted administrators. Business urgency is highest where Wi-Fi access could lead to internal network access or customer-impacting compromise.
Technical view
CVE-2018-20439 affects Technicolor DPC3928SL firmware D3928SL-PSIP-13-A010-c3420r55105-170214a. The CVE states remote attackers can discover Wi-Fi credentials through specific SNMP OID requests. The record lists no CWE, CVSS score, CPEs, or expanded affected version range.
Likely exposure
Exposure is likely limited to environments using the identified Technicolor DPC3928SL build with SNMP reachable from untrusted networks. The CVE data does not confirm other models, firmware versions, or vendor-wide impact.
Exploitation context
The CVE describes remote credential discovery through SNMP requests. There is no KEV listing and no cited evidence of active exploitation in the provided sources. Treat internet- or guest-accessible SNMP as the main exposure concern.
Researcher notes
The public CVE record is sparse. It identifies two SNMP OIDs associated with Wi-Fi credential disclosure but gives no CVSS, CWE, CPE, vendor advisory, patch status, or broader version analysis. Avoid assuming impact beyond the named device build.
Mitigation direction
- Identify Technicolor DPC3928SL devices and firmware versions in use.
- Restrict SNMP access to trusted management networks only.
- Disable SNMP where it is not operationally required.
- Check vendor or ISP guidance for firmware or configuration fixes.
- Rotate Wi-Fi credentials after exposure is confirmed or suspected.
Validation and detection
- Inventory gateways matching Technicolor DPC3928SL and the specified firmware build.
- Review whether SNMP is enabled and reachable from untrusted networks.
- Check logs or network controls for unexpected SNMP access attempts.
- Confirm whether Wi-Fi credentials were exposed before rotating them.
- Document compensating controls if no vendor patch 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
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CVE-2018-20439 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.