Security readout for executives and security teams
Plain-English summary
Cisco Webex Teams for Windows could load an untrusted DLL in a way that lets a local attacker run code when the application starts. This is not a remote takeover by itself, but it can turn local access into code execution under another user's privileges.
Executive priority
Handle as a moderate endpoint risk. Prioritize remediation on shared Windows systems, administrator workstations, and environments where local compromise could lead to broader access.
Technical view
CVE-2019-16001 is a CWE-427 uncontrolled search path issue in Cisco Webex Teams for Windows. The CVE states insufficient runtime resource validation can allow DLL hijacking by a local attacker with valid system credentials. Launching the vulnerable application can execute attacker-controlled code with another user's privileges.
Likely exposure
Exposure is limited to Windows systems running affected Cisco Webex Teams versions. The source bundle does not specify exact affected versions, so teams should compare deployed clients against Cisco's advisory and local software inventory.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires local access and valid credentials on the Windows system, plus user interaction through launching the vulnerable application.
Researcher notes
The bundle gives the vulnerability class, attack locality, required local credentials, user interaction, and impact. It does not provide exact affected version ranges, fixed builds, exploit observations, or detailed workarounds.
Mitigation direction
- Review Cisco's advisory for affected and fixed release guidance.
- Update Cisco Webex Teams for Windows where Cisco recommends remediation.
- Restrict local write access in application-adjacent and user-controlled locations.
- Monitor endpoints for unexpected DLL loads by Webex Teams processes.
Validation and detection
- Inventory Windows endpoints with Cisco Webex Teams installed.
- Compare deployed versions against Cisco's advisory.
- Confirm standard users cannot write to sensitive application directories.
- Review endpoint telemetry for suspicious Webex Teams child processes or DLL loads.
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-427: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-16001 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
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
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:N/UI:R/S:U/C:L/I:L/A:L1.83.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20191120 Cisco Webex Teams for Windows DLL Hijacking 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.
Uncontrolled Search Path Element
Uncontrolled Search Path Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
