Security readout for executives and security teams
Plain-English summary
This is a local information disclosure issue in Cisco Webex software for Windows. A person who already has valid access to the Windows machine could read Webex shared memory and obtain sensitive data such as usernames, meeting details, or authentication tokens.
Executive priority
Treat as a moderate endpoint confidentiality risk. Prioritize shared workstations and environments where exposed Webex tokens or meeting details could support follow-on account or meeting access.
Technical view
Cisco describes unsafe shared-memory handling in Webex Meetings Desktop App and Webex Productivity Tools for Windows. The CVSS 3.1 vector is local, low complexity, low privileges, no user interaction, confidentiality high, with no integrity or availability impact.
Likely exposure
Exposure is most relevant on Windows endpoints running affected Webex desktop software, especially shared systems where one user authenticates to Webex and another valid local user logs in afterward.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. Exploitation requires valid local Windows credentials and access after another user has authenticated with Webex on the same endpoint.
Researcher notes
The key condition is cross-user local exposure through shared memory. Evidence supports confidentiality impact only. The bundle does not provide affected version ranges, exploit availability, or named fixes beyond the Cisco advisory reference.
Mitigation direction
- Review Cisco advisory for fixed releases, workarounds, and product-specific guidance.
- Inventory Windows endpoints running Webex Meetings Desktop App or Webex Productivity Tools.
- Upgrade or remove affected Webex software according to Cisco guidance.
- Limit shared Windows workstation use where Webex authentication occurs.
- Restrict local account access to trusted users until remediation is complete.
Validation and detection
- Confirm whether Cisco Webex desktop software is installed on Windows endpoints.
- Identify shared Windows systems with multiple interactive users.
- Compare installed Webex versions against Cisco advisory guidance.
- Verify remediation status after upgrades or software removal.
- Check endpoint access policies for unnecessary local user accounts.
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-202: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-1372 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210217 Cisco Webex Meetings Desktop App and Webex Productivity Tools 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 Through Data Queries
Exposure of Sensitive Information Through Data Queries represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
