Security readout for executives and security teams
Plain-English summary
This flaw could let a removed Webex meeting participant keep listening and speaking over audio. The business risk is confidential conversation exposure, not system takeover. The supplied sources do not show active exploitation or name specific vulnerable versions in the bundle.
Executive priority
Treat this as a confidentiality issue for sensitive meetings. It is not rated critical and has no supplied evidence of active exploitation, but affected Webex environments should be checked and remediated because audio leakage can expose privileged business discussions.
Technical view
CVE-2020-3471 is a Cisco Webex Meetings and Webex Meetings Server information exposure issue caused by synchronization failure between meeting and media services. It is remotely reachable, unauthenticated, low complexity, and rated CVSS 6.5 with high confidentiality impact only.
Likely exposure
Organizations using Cisco Webex Meetings or Cisco Webex Meetings Server on a vulnerable Webex site may be exposed, especially where sensitive meetings occur. The provided bundle lists Cisco WebEx Meetings Server but does not provide affected version ranges.
Exploitation context
The source bundle describes crafted requests to a vulnerable Webex site allowing audio persistence after expulsion. CISA KEV status is false in the provided data, and no cited source in the bundle confirms active exploitation.
Researcher notes
Key detail is service-state mismatch: meeting expulsion did not reliably terminate media audio. CWE-20 is listed, but the practical impact is unauthorized bidirectional audio retention. The supplied bundle lacks exact affected versions and concrete fix details, so avoid over-scoping.
Mitigation direction
- Review Cisco’s advisory for affected releases and official remediation guidance.
- Inventory Cisco Webex Meetings Server and Webex site deployments.
- Apply vendor-provided fixed releases or configuration guidance where applicable.
- Prioritize remediation for environments hosting executive, legal, incident, or customer meetings.
Validation and detection
- Confirm whether any Webex Meetings Server or Webex site matches Cisco’s advisory scope.
- Check current product versions against Cisco’s official fixed-release guidance.
- Review meeting security logs for expelled participants with continued audio presence.
- Verify remediation status after applying Cisco guidance or updates.
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.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-3471 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20201118 Cisco Webex Meetings and Cisco Webex Meetings Server Unauthorized Audio Information Exposure VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.