A vulnerability in Cisco WebEx browser extensions for Google Chrome and Mozilla Firefox could allow an unauthenticated, remote attacker to e
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
- Jul 25, 2017
- Updated
- Jun 16, 2026
- EPSS
- 6.0% · 93th percentile
- CWE
- CWE-119
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Report tools
Action score
37
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 2 / 30 · 6.0%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | webex event center | cpe:2.3:a:cisco:webex_event_center |
| cisco | webex meeting center | cpe:2.3:a:cisco:webex_meeting_center |
| cisco | webex meetings | cpe:2.3:a:cisco:webex_meetings |
| cisco | webex meetings server | cpe:2.3:a:cisco:webex_meetings_server |
| cisco | webex meetings server 2.0 | cpe:2.3:a:cisco:webex_meetings_server_2.0 |
| cisco | webex meetings server 2.0 mr8 patch | cpe:2.3:a:cisco:webex_meetings_server_2.0_mr8_patch |
| cisco | webex meetings server 2.0 mr9 patch | cpe:2.3:a:cisco:webex_meetings_server_2.0_mr9_patch |
| cisco | webex meetings server 2.5 | cpe:2.3:a:cisco:webex_meetings_server_2.5 |
| cisco | webex meetings server 2.5 mr2 patch | cpe:2.3:a:cisco:webex_meetings_server_2.5_mr2_patch |
| cisco | webex meetings server 2.5 mr5 patch | cpe:2.3:a:cisco:webex_meetings_server_2.5_mr5_patch |
| cisco | webex meetings server 2.5 mr6 patch | cpe:2.3:a:cisco:webex_meetings_server_2.5_mr6_patch |
| cisco | webex meetings server 2.6 | cpe:2.3:a:cisco:webex_meetings_server_2.6 |
and 8 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco webex event centert30_base
- cisco webex event centert31_base
- cisco webex event centert32_base
- cisco webex meeting centert30_base
- cisco webex meeting centert31_base
- cisco webex meeting centert32_base
- cisco webex meetingst30_base
- cisco webex meetings server1.1_base
- cisco webex meetings server1.5_base
- cisco webex meetings server1.5.1.131
- cisco webex meetings server1.5.1.6
- cisco webex meetings server2.0_base
- cisco webex meetings server2.0.1.107
- cisco webex meetings server2.5_base
- cisco webex meetings server2.5.1.29
- cisco webex meetings server2.5.1.5
- cisco webex meetings server2.5.99.2
- cisco webex meetings server2.6.0
- cisco webex meetings server2.6.1.39
- cisco webex meetings server2.7_base
Versions reported by the vendor
Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.
n/a Cisco WebEx Browser Extension
- Cisco WebEx Browser Extensionaffected
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory BufferCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Buffer ManipulationCAPEC-123likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
ATT&CK techniques
—
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/99614
- www.securitytracker.com/id/1038909
- www.securitytracker.com/id/1038910
- www.securitytracker.com/id/1038911
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170717-webex
Vendor advisories and official records. Exploit/PoC links are deliberately left out.