Security readout for executives and security teams
Plain-English summary
CVE-2020-24113 is a directory traversal issue in the contacts file upload interface of Yealink W60B firmware 77.83.0.85. The public description says it can expose sensitive information and cause denial of service. The source bundle does not provide CVSS scoring, authentication requirements, fixed versions, or confirmed exploitation.
Executive priority
Treat this as a targeted network-device exposure issue, not a confirmed widespread emergency. Prioritize any internet-exposed or unmanaged Yealink W60B deployments because the stated impacts include sensitive information loss and service disruption.
Technical view
The vulnerability is described as directory traversal in a file upload path tied to contacts handling on Yealink W60B 77.83.0.85. Impact is stated as sensitive information disclosure and DoS. Available sources do not define affected CPEs, CWE, exploit prerequisites, vulnerable endpoints, or remediation details.
Likely exposure
Exposure is most likely where Yealink W60B devices on firmware 77.83.0.85 have the contacts upload or management interface reachable by untrusted users. The source bundle does not confirm whether authentication is required or whether other versions are affected.
Exploitation context
CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation. A public vulnerability reference exists, but the supplied evidence is incomplete on exploit maturity, attack complexity, and required privileges.
Researcher notes
Key gaps remain: no CVSS, CWE, affected CPEs, authentication context, fixed version, or exploit status are present in the bundle. Do not broaden affected products beyond Yealink W60B firmware 77.83.0.85 without additional vendor or CNA evidence.
Mitigation direction
- Check Yealink support or firmware guidance for a fixed version or advisory.
- Restrict device management and contacts upload access to trusted administration networks.
- Remove any public internet exposure for affected Yealink W60B administration interfaces.
- Monitor affected devices for unexpected restarts, failures, or unusual upload activity.
- Prioritize configuration backups before any firmware or compensating-control changes.
Validation and detection
- Inventory Yealink W60B devices and record firmware versions.
- Identify any devices running firmware 77.83.0.85.
- Confirm whether management or contacts upload interfaces are externally reachable.
- Review vendor guidance for affected versions and remediation status.
- Check logs or monitoring for abnormal upload attempts or denial-of-service symptoms.
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.
File access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-24113 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://fuo.fi/CVE-2020-24113/CVE reference
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.