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CVE Record

CVE-2019-16001: Cisco Webex Teams for Windows DLL Hijacking Vulnerability

A vulnerability in the loading mechanism of specific dynamic link libraries in Cisco Webex Teams for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of the resources loaded by the application at run time. An attacker could exploit this vulnerability by crafting a malicious DLL file and placing it in a specific location on the targeted system. The malicious DLL file would execute when the vulnerable application is launched. A successful exploit could allow the attacker to execute arbitrary code on the target machine with the privileges of another user account.

MediumCVSS 5.3Not KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

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.
Prepared
Confidence
medium
Sources
3

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

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 lookup
description · low confidence lookup

Execution 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 lookup
cve · low confidence lookup

CVE-2019-16001 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.0MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L1.83.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.3Medium
CVSS 3.0 vector shape for CVE-2019-16001Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco Webex TeamsunspecifiedListed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-427 · source CWE mapping

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.