Cisco Webex Meetings, Webex Network Recording Player, and Webex Teams DLL Injection Vulnerability
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- 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 Cisco Webex Meetings Desktop App for Windows, Cisco Webex Meetings Server, Cisco Webex Network Recording Player for Windows, and Cisco Webex Teams for Windows could allow an authenticated, local attacker to perform a DLL injection attack on an affected device. To exploit this vulnerability, the attacker must have valid credentials on the Windows system. This vulnerability is due to incorrect handling of directory paths at run time. An attacker could exploit this vulnerability by inserting a configuration file in a specific path in the system, which can cause a malicious DLL file to be loaded when the application starts. A successful exploit could allow the attacker to execute arbitrary code on the affected system with the privileges of another user account.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Webex Teams | all versions | — | No fix listed | CNA |
- Cisco Webex Teams VendorCisco Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:webex_meetings_desktop:-:*:*:*:*:windows:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_online:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_meetings_server:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_network_recording_player:-:*:*:*:*:windows:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:a:cisco:webex_teams:3.0.15485.0:*:*:*:*:windows:*:* | 3.0.15485.0 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:webex_meetings_desktop:-:*:*:*:*:windows:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_online:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_meetings_server:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_network_recording_player:-:*:*:*:*:windows:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:a:cisco:webex_teams:3.0.15485.0:*:*:*:*:windows:*:* Versions 3.0.15485.0 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-1536
- 2026-10-03 Alias added: GHSA-hwgc-9p3v-8ffx
References
More Cisco Webex Meetings Desktop vulnerabilities
- TI-2018-11002 Cisco Webex Meetings Desktop App Update Service Command Injection Vulnerability CVSS 3.0HIGH 7.8
- TI-2021-01229 Cisco Webex Network Recording Player and Webex Player Memory Corruption Vulnerability CVSS 3.1HIGH 7.8
Sources
- CVE-2021-1536 · CVE Program
- CVE-2021-1536 · NVD
- FIRST EPSS
- GHSA-hwgc-9p3v-8ffx · GitHub Advisory Database · CC BY 4.0
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