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CVE-2017-3796 Cisco CVE debrief

CVE-2017-3796 affects Cisco WebEx Meetings Server 2.6 and allows an authenticated, remote attacker to execute predetermined shell commands on other hosts. The vulnerability is rated HIGH by NVD and maps to CWE-78 (OS Command Injection). Because exploitation requires authentication but can affect host integrity and availability, it deserves prompt review in any environment that still runs the affected release.

Vendor
Cisco
Product
CVE-2017-3796
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2017-01-26
Original CVE updated
2026-05-13
Advisory published
2017-01-26
Advisory updated
2026-05-13

Who should care

Administrators, security teams, and incident responders responsible for Cisco WebEx Meetings Server 2.6 deployments should treat this as relevant, especially where authenticated users can reach the application or where the server has access to other internal hosts.

Technical summary

The NVD record describes an authenticated remote command-execution issue in Cisco WebEx Meetings Server, with the vulnerable product identified as WebEx Meetings Server 2.6.0. NVD assigns CVSS 3.0 vector CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H, indicating network reachability, low attack complexity, required high privileges, and high potential impact on confidentiality, integrity, and availability. The weakness is categorized as CWE-78.

Defensive priority

High for exposed or business-critical WebEx Meetings Server 2.6 deployments; medium if the product is isolated and tightly access-controlled. Prioritize any instance that supports privileged authenticated users or has connectivity to sensitive internal hosts.

Recommended defensive actions

  • Inventory all Cisco WebEx Meetings Server deployments and confirm whether any instance runs version 2.6.0.
  • Use Cisco's advisory for CSCuz03353 to determine the fixed release or remediation path for affected systems.
  • Restrict and monitor authenticated access to the WebEx Meetings Server environment, especially administrative and service accounts.
  • Review logs for unusual command execution, unexpected host-to-host activity, or changes in server behavior.
  • Segment the server from sensitive internal hosts where possible to reduce lateral movement risk if the issue is abused.

Evidence notes

This debrief is based on the supplied NVD record and its Cisco-linked vendor reference. The core facts used here are the authenticated remote shell-command execution description, the affected CPE entry for cisco:webex_meetings_server:2.6.0, the CVSS vector, and the CWE-78 classification. No exploit steps or unsupported remediation claims are included.

Official resources

Publicly disclosed on 2017-01-26 per the supplied CVE/NVD timestamps. The NVD record was last modified on 2026-05-13.