Security readout for executives and security teams
Plain-English summary
CVE-2019-1939 affects Cisco Webex Teams on Windows. A malicious website could trigger the client’s logging feature to modify files and run commands as the targeted user. It requires user interaction and is high complexity, but successful exploitation could compromise confidentiality, integrity, and availability on that endpoint.
Executive priority
Treat this as a high-priority endpoint remediation item if Webex Teams for Windows is present. It is not marked as known exploited in the supplied sources, but successful exploitation could let an external attacker run commands as the user.
Technical view
The vulnerability is a CWE-74 command-injection-style issue in Webex Teams for Windows logging functionality. The CVSS 3.0 score is 7.5 with network attack vector, no privileges required, required user interaction, high attack complexity, and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to Windows systems running affected Cisco Webex Teams clients. The supplied sources do not identify affected or fixed version ranges, so teams should validate installed versions against Cisco’s advisory.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. Exploitation requires convincing a user to visit a crafted website that submits malicious input to the affected client.
Researcher notes
Key unknowns are affected version ranges, fixed builds, and real-world exploitation. The advisory and CVE data support remote, unauthenticated attack with required user interaction. Avoid assuming exposure beyond Cisco Webex Teams for Windows unless vendor guidance confirms it.
Mitigation direction
- Inventory Windows endpoints running Cisco Webex Teams.
- Check Cisco’s advisory for affected and fixed release guidance.
- Update or replace affected clients according to vendor guidance.
- Limit user privileges where possible on affected Windows endpoints.
- Monitor endpoint controls for suspicious Webex Teams child processes.
Validation and detection
- Compare installed Webex Teams versions against Cisco’s advisory.
- Confirm software inventory shows remediated or non-affected Windows clients.
- Review EDR telemetry for unusual file changes by Webex Teams.
- Review EDR telemetry for unexpected Webex Teams process launches.
- Document any unknown versions as unresolved exposure.
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-74: 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-2019-1939 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
- High
- CVSS
- 7.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
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:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190904 Cisco Webex Teams Logging Feature Command Execution 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 Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.