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TI-2020-03080 Aliases CVE-2020-3535GHSA-v4rq-rq59-hgx8

Cisco Webex Teams Client for Windows DLL Hijacking Vulnerability

Priority LOW 39CWE-427Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-427.

Summary

A vulnerability in the loading mechanism of specific DLLs in the Cisco Webex Teams client for Windows could allow an authenticated, local attacker to load a malicious library. To exploit this vulnerability, the attacker needs valid credentials on the Windows system. The vulnerability is due to incorrect handling of directory paths at run time. An attacker could exploit this vulnerability by placing a malicious DLL file in a specific location on the targeted system. This file will execute when the vulnerable application launches. A successful exploit could allow the attacker to execute arbitrary code on the targeted system with the privileges of another user’s account.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00593 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Webex Teamsall versions—No fix listedCNA
  • Cisco Webex Teams VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:webex_teams:*:*:*:*:*:windows:*:*3.0.13464.0 – 3.0.16040.0VulnerableCisco
  • cpe:2.3:a:cisco:webex_teams:*:*:*:*:*:windows:*:* Versions 3.0.13464.0 – 3.0.16040.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3535
  2. 2026-10-03 Alias added: GHSA-v4rq-rq59-hgx8

References

Advisory 1

  • TI-2019-01262 Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability CVSS 3.0HIGH 7.8
  • TI-2019-01559 Cisco Webex Teams Logging Feature Command Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2018-00346 Improper input validation in Cisco Webex Teams unknown CVSS 3.1HIGH 8.8
  • TI-2025-14536 Cisco Webex App Client-Side Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2018-00395 Cisco Webex Teams Information Disclosure and Modification Vulnerability CVSS 3.1HIGH 8.7
  • TI-2021-01229 Cisco Webex Network Recording Player and Webex Player Memory Corruption Vulnerability CVSS 3.1HIGH 7.8
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences