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TI-2026-16358 Aliases CVE-2026-20149GHSA-wgqr-v4gj-r4jj

Cross-site scripting in Cisco Webex Meetings

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

A vulnerability in Cisco Webex could have allowed an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack. Cisco has addressed this vulnerability, and no customer action is needed. This vulnerability was due to improper filtering of user-supplied input. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to follow a malicious link. A successful exploit could have allowed the attacker to conduct an XSS attack against the targeted user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0028 20th 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
Partial

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 MeetingsN/A—No fix listedCNA
  • Cisco Webex Meetings VendorCisco Affected N/A Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:webex:-:*:*:*:*:*:*:*not specified by NVDVulnerableCisco
  • cpe:2.3:a:cisco:webex:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20149
  2. 2026-10-03 Alias added: GHSA-wgqr-v4gj-r4jj

References

Advisory 1

  • TI-2017-02920 Memory corruption in Cisco WebEx browser extensions CVSS 3.0HIGH 8.8
  • TI-2009-02743 Buffer overflow in atrpui.dll in the Cisco WebEx WRF Player 26.x before 26.49.32 for… CVSS 2.0HIGH 9.3
  • TI-2009-02742 Heap-based buffer overflow in atas32.dll in the Cisco WebEx WRF Player 26.x before… CVSS 2.0HIGH 9.3
  • TI-2009-02741 Heap-based buffer overflow in atas32.dll in the Cisco WebEx WRF Player 26.x before… CVSS 2.0HIGH 9.3
  • TI-2009-02740 Stack-based buffer overflow in ataudio.dll in the Cisco WebEx WRF Player 26.x before… CVSS 2.0HIGH 9.3
  • TI-2009-02739 Heap-based buffer overflow in atas32.dll in the Cisco WebEx WRF Player 26.x before… CVSS 2.0HIGH 9.3
See all 9 →

Sources

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