Security readout for executives and security teams
Plain-English summary
This CVE concerns older D-Link DCM-604 and DCM-704 cable modem firmware exposing credentials through SNMP requests. If SNMP is reachable by an attacker, device credentials may be disclosed without normal authentication barriers. Business urgency depends on whether these models are deployed and whether SNMP is exposed beyond trusted management networks.
Executive priority
Prioritize this if affected modems are still deployed or externally reachable. The practical business risk is credential exposure on network edge equipment, but the provided evidence does not confirm exploitation or a vendor fix.
Technical view
The CVE record states that D-Link DCM-604 DCM604_C1_ViaCabo_1.04_20130606 and DCM-704 EU_DCM-704_1.10 devices disclose credentials through specific SNMP OID requests. No CVSS score, CWE, vendor advisory, or confirmed fixed version is included in the provided sources.
Likely exposure
Exposure is likely limited to organizations still using the named D-Link DCM-604 or DCM-704 firmware versions, especially where SNMP is reachable from untrusted networks or broadly accessible internal segments.
Exploitation context
The sources describe remote credential discovery through SNMP. The bundle does not show CISA KEV listing, active exploitation, public weaponization status, or a vendor-confirmed patch. Treat internet-reachable SNMP on affected devices as the main risk condition.
Researcher notes
Key gaps are the missing CVSS score, absent CWE mapping, no vendor advisory in the bundle, and unclear patch status. Analysis should focus on asset confirmation, SNMP exposure, and whether the referenced firmware remains in service.
Mitigation direction
- Inventory for the named D-Link DCM-604 and DCM-704 firmware versions.
- Restrict SNMP access to trusted management hosts only.
- Remove SNMP exposure from the internet and untrusted network segments.
- Check D-Link or service-provider guidance for firmware updates or replacement options.
- Rotate exposed device credentials after containment.
Validation and detection
- Confirm whether affected D-Link models and firmware versions are present.
- Review firewall rules and scans for SNMP reachability to those devices.
- Verify SNMP is restricted to authorized management networks.
- Check device logs and monitoring for unexpected SNMP access where available.
- Document vendor guidance status, including whether updates are unavailable.
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-2018-20389 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
- 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://github.com/ezelf/sensitivesOids/blob/master/oidpassswordleaks.csvCVE reference · x_refsource_MISC
- https://misteralfa-hack.blogspot.com/2018/12/stringbleed-y-ahora-que-passwords-leaks.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.