Security readout for executives and security teams
Plain-English summary
This flaw could let someone who already has local access to a Windows machine read sensitive Webex data from shared memory. The exposed data may include usernames, meeting details, or authentication tokens that could support later account or meeting compromise.
Executive priority
Treat this as a moderate-priority endpoint remediation item. It does not indicate remote takeover, but exposed tokens and meeting data can increase business risk if an attacker already has local foothold.
Technical view
CVE-2020-3347 is a CWE-200 information disclosure issue in Cisco Webex Meetings Desktop App for Windows. Unsafe shared-memory handling allows an authenticated local attacker with memory-viewing permissions to retrieve sensitive values. CVSS 3.0 is 5.5: local attack vector, low complexity, low privileges, no user interaction, high confidentiality impact.
Likely exposure
Exposure is most likely on Windows endpoints running the affected Cisco Webex Meetings desktop software. This is not described as a remote internet-facing bug; the attacker needs local authenticated access and permission to inspect memory.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The practical risk is post-access data theft, where a local attacker may collect tokens or meeting information to aid follow-on activity.
Researcher notes
Focus validation on local Windows endpoint exposure, installed Webex desktop versions, and data sensitivity. The bundle’s affected-product metadata is incomplete, so rely on Cisco’s advisory for exact affected and fixed version mapping. Avoid assuming exploit activity without additional evidence.
Mitigation direction
- Check the Cisco advisory for affected versions and fixed software guidance.
- Upgrade or remove affected Webex Meetings desktop installations where confirmed vulnerable.
- Limit local interactive access on shared or high-risk Windows endpoints.
- Restrict the ability to run untrusted local applications.
- Review endpoint controls for unusual local memory access behavior.
Validation and detection
- Inventory Windows endpoints with Cisco Webex Meetings desktop software installed.
- Compare installed versions against the Cisco advisory before declaring exposure.
- Confirm whether vulnerable systems handle privileged meetings or sensitive accounts.
- Review local user access on affected endpoints.
- Document remediation status and any compensating controls used.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2020-3347 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
- 5.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/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:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.5MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20200617 Cisco Webex Meetings Desktop App for Windows Shared Memory Information Disclosure 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.