Security readout for executives and security teams
Plain-English summary
This CVE describes credential exposure on specific Comtrend CM-6200un and CM-6300n devices. A remote party able to query SNMP could obtain credentials from documented SNMP objects. The sources do not provide a CVSS score, vendor advisory, patch status, or evidence of active exploitation.
Executive priority
Prioritize remediation if these devices are internet-facing or manage customer, remote office, or privileged network access. Credential disclosure on network equipment can enable follow-on compromise, even though public exploit and patch evidence is incomplete.
Technical view
CVE-2018-20388 affects Comtrend CM-6200un firmware 123.447.007 and CM-6300n firmware 123.553mp1.005. The CVE states that remote SNMP requests to specific private OIDs can disclose credentials. The public record does not identify affected configurations beyond those models and versions.
Likely exposure
Exposure is most likely where these Comtrend devices are still deployed and SNMP is reachable from the internet, customer networks, or broad internal segments. Evidence is limited to the named models and firmware versions.
Exploitation context
The CVE describes remote credential discovery via SNMP, but the provided sources do not show active exploitation, KEV listing, exploit maturity, or required SNMP community settings. Treat internet-reachable SNMP as the main risk amplifier.
Researcher notes
The record is sparse: no CVSS vector, CWE, CPE, vendor advisory, or official mitigation is provided in the bundle. Do not generalize beyond the two named models and versions without additional vendor or fleet evidence.
Mitigation direction
- Inventory Comtrend CM-6200un and CM-6300n devices and confirm firmware versions.
- Disable SNMP where it is not operationally required.
- Restrict SNMP access to trusted management hosts and networks only.
- Rotate credentials that may have been exposed on affected devices.
- Check Comtrend or ISP guidance for firmware updates or replacement options.
- Monitor for unexpected SNMP access to affected devices.
Validation and detection
- Confirm whether named Comtrend models and versions exist in the environment.
- Verify SNMP is not reachable from the internet or untrusted networks.
- Review device configuration for unnecessary SNMP exposure.
- Check logs or network telemetry for unexpected SNMP polling.
- Validate credential rotation for accounts stored or managed on affected devices.
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-2018-20388 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.