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Vulnerability record · CVE-2017-6753 · published 25 July 2017

CVE-2017-6753: Cisco webex event center memory buffer overflow vulnerability

Cisco · Webex Event Center

A vulnerability in Cisco WebEx browser extensions for Google Chrome and Mozilla Firefox could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server, Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center), and Cisco WebEx Meetings when they are running on Microsoft Windows. The vulnerability is due to a design defect in the extension. An attacker who can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser. The following versions of the Cisco WebEx browser extensions are affected: Versions prior to 1.0.12 of the Cisco WebEx extension on Google Chrome, Versions prior to 1.0.12 of the Cisco WebEx extension on Mozilla Firefox. Cisco Bug IDs: CSCvf15012 CSCvf15020 CSCvf15030 CSCvf15033 CSCvf15036 CSCvf15037.

8.8 CVSS 3.0 High EPSS 6.0% · top 7.0% CWE-119 · Memory buffer overflow
8.8CVSS 3.0 base score, v2 9.3
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
20Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

A vulnerability in Cisco WebEx browser extensions for Google Chrome and Mozilla Firefox could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server, Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center), and Cisco WebEx Meetings when they are running on Microsoft Windows. The vulnerability is due to a design defect in the extension. An attacker who can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser. The following versions of the Cisco WebEx browser extensions are affected: Versions prior to 1.0.12 of the Cisco WebEx extension on Google Chrome, Versions prior to 1.0.12 of the Cisco WebEx extension on Mozilla Firefox. Cisco Bug IDs: CSCvf15012 CSCvf15020 CSCvf15030 CSCvf15033 CSCvf15036 CSCvf15037.

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

Affected products

20 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/99614 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038909 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038910 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038911 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170717-webex Vendor Advisory
http://www.securityfocus.com/bid/99614 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038909 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038910 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038911 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170717-webex Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-6753), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.