CVE-2017-6753

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.

Published: 2017-07-25 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-6753 is rated Moderate Risk (62.5/100): CVSS High severity, with high exploitation likelihood (EPSS 5.95%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-6753

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 13.96% 5.95% -8.01%
2 2026-03-28 11.10% 13.96% +2.86%
3 2025-11-21 — 11.10% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-6753

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2017-6753

Affected software / configurations for CVE-2017-6753

Vendor Product Version Raw CPE
cisco webex_event_center t30_base cpe:2.3:a:cisco:webex_event_center:t30_base:*:*:*:*:*:*:*
cisco webex_event_center t31_base cpe:2.3:a:cisco:webex_event_center:t31_base:*:*:*:*:*:*:*
cisco webex_event_center t32_base cpe:2.3:a:cisco:webex_event_center:t32_base:*:*:*:*:*:*:*
cisco webex_meeting_center t30_base cpe:2.3:a:cisco:webex_meeting_center:t30_base:*:*:*:*:*:*:*
cisco webex_meeting_center t31_base cpe:2.3:a:cisco:webex_meeting_center:t31_base:*:*:*:*:*:*:*
cisco webex_meeting_center t32_base cpe:2.3:a:cisco:webex_meeting_center:t32_base:*:*:*:*:*:*:*
cisco webex_meetings t30_base cpe:2.3:a:cisco:webex_meetings:t30_base:*:*:*:*:*:*:*
cisco webex_meetings_server 1.1_base cpe:2.3:a:cisco:webex_meetings_server:1.1_base:*:*:*:*:*:*:*
cisco webex_meetings_server 1.5.1.6 cpe:2.3:a:cisco:webex_meetings_server:1.5.1.6:*:*:*:*:*:*:*
cisco webex_meetings_server 1.5.1.131 cpe:2.3:a:cisco:webex_meetings_server:1.5.1.131:*:*:*:*:*:*:*
cisco webex_meetings_server 1.5_base cpe:2.3:a:cisco:webex_meetings_server:1.5_base:*:*:*:*:*:*:*
cisco webex_meetings_server 2.0.1.107 cpe:2.3:a:cisco:webex_meetings_server:2.0.1.107:*:*:*:*:*:*:*
cisco webex_meetings_server 2.0_base cpe:2.3:a:cisco:webex_meetings_server:2.0_base:*:*:*:*:*:*:*
cisco webex_meetings_server 2.5.1.5 cpe:2.3:a:cisco:webex_meetings_server:2.5.1.5:*:*:*:*:*:*:*
cisco webex_meetings_server 2.5.1.29 cpe:2.3:a:cisco:webex_meetings_server:2.5.1.29:*:*:*:*:*:*:*
cisco webex_meetings_server 2.5.99.2 cpe:2.3:a:cisco:webex_meetings_server:2.5.99.2:*:*:*:*:*:*:*
cisco webex_meetings_server 2.5_base cpe:2.3:a:cisco:webex_meetings_server:2.5_base:*:*:*:*:*:*:*
cisco webex_meetings_server 2.6.0 cpe:2.3:a:cisco:webex_meetings_server:2.6.0:*:*:*:*:*:*:*
cisco webex_meetings_server 2.6.1.39 cpe:2.3:a:cisco:webex_meetings_server:2.6.1.39:*:*:*:*:*:*:*
cisco webex_meetings_server 2.7.1 cpe:2.3:a:cisco:webex_meetings_server:2.7.1:*:*:*:*:*:*:*
cisco webex_meetings_server 2.7_base cpe:2.3:a:cisco:webex_meetings_server:2.7_base:*:*:*:*:*:*:*
cisco webex_meetings_server 2.8_base cpe:2.3:a:cisco:webex_meetings_server:2.8_base:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr2 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr3 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr3:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr4 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr4:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr5 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr5:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr6 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr6:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr7 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr7:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr8 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr8:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0 mr9 cpe:2.3:a:cisco:webex_meetings_server_2.0:mr9:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0_mr8_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.0_mr8_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0_mr9_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.0_mr9_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0_mr9_patch 2 cpe:2.3:a:cisco:webex_meetings_server_2.0_mr9_patch:2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.0_mr9_patch 3 cpe:2.3:a:cisco:webex_meetings_server_2.0_mr9_patch:3:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr1 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr2 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr3 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr3:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr4 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr4:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr5 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr5:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5 mr6 cpe:2.3:a:cisco:webex_meetings_server_2.5:mr6:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr2_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr2_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr5_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr5_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr6_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr6_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr6_patch 2 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr6_patch:2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr6_patch 3 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr6_patch:3:*:*:*:*:*:*:*
cisco webex_meetings_server_2.5_mr6_patch 4 cpe:2.3:a:cisco:webex_meetings_server_2.5_mr6_patch:4:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6 mr1 cpe:2.3:a:cisco:webex_meetings_server_2.6:mr1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6 mr2 cpe:2.3:a:cisco:webex_meetings_server_2.6:mr2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6 mr3 cpe:2.3:a:cisco:webex_meetings_server_2.6:mr3:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6_mr1_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.6_mr1_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6_mr2_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.6_mr2_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6_mr3_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.6_mr3_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.6_mr3_patch 2 cpe:2.3:a:cisco:webex_meetings_server_2.6_mr3_patch:2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.7 mr1 cpe:2.3:a:cisco:webex_meetings_server_2.7:mr1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.7 mr2 cpe:2.3:a:cisco:webex_meetings_server_2.7:mr2:*:*:*:*:*:*:*
cisco webex_meetings_server_2.7_mr1_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.7_mr1_patch:1:*:*:*:*:*:*:*
cisco webex_meetings_server_2.7_mr2_patch 1 cpe:2.3:a:cisco:webex_meetings_server_2.7_mr2_patch:1:*:*:*:*:*:*:*
cisco webex_support_center t30_base cpe:2.3:a:cisco:webex_support_center:t30_base:*:*:*:*:*:*:*
cisco webex_support_center t31_base cpe:2.3:a:cisco:webex_support_center:t31_base:*:*:*:*:*:*:*
cisco webex_support_center t32_base cpe:2.3:a:cisco:webex_support_center:t32_base:*:*:*:*:*:*:*
cisco webex_training_center t30_base cpe:2.3:a:cisco:webex_training_center:t30_base:*:*:*:*:*:*:*
cisco webex_training_center t31_base cpe:2.3:a:cisco:webex_training_center:t31_base:*:*:*:*:*:*:*
cisco webex_training_center t32_base cpe:2.3:a:cisco:webex_training_center:t32_base:*:*:*:*:*:*:*

References for CVE-2017-6753

cvelogic Threat Intelligence