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CVE-2017-3837 Cisco CVE debrief

CVE-2017-3837 is a Cisco Meeting Server Web Bridge vulnerability that can let an authenticated remote attacker with a valid Web Bridge session retrieve memory contents and potentially crash the application. The main risk is disclosure of confidential information, with an additional availability impact from an unexpected denial of service. Cisco and NVD list affected releases prior to 2.1.2, including 2.0 through 2.1.1.

Vendor
Cisco
Product
CVE-2017-3837
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2017-02-22
Original CVE updated
2026-05-13
Advisory published
2017-02-22
Advisory updated
2026-05-13

Who should care

Cisco Meeting Server administrators, security teams operating Web Bridge-enabled deployments, and incident responders responsible for protecting authenticated collaboration services. Environments running CMS releases prior to 2.1.2 should prioritize review.

Technical summary

The NVD record describes an HTTP packet processing vulnerability in the Web Bridge interface of Cisco Meeting Server, formerly Acano Conferencing Server. Exploitation requires authentication and a valid Web Bridge session. The impact is confidentiality exposure through memory disclosure and possible availability loss if the application crashes. NVD maps the issue to CWE-20 and gives CVSS v3.0 8.1 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H).

Defensive priority

High. Although attacker access requires authentication, the combination of remote reachability, high confidentiality impact, and potential service disruption makes this a significant issue for any exposed or broadly used Web Bridge deployment.

Recommended defensive actions

  • Upgrade Cisco Meeting Server to 2.1.2 or later, as listed in the supplied record.
  • Inventory any CMS or Acano Conferencing Server instances running releases 2.0 through 2.1.1.
  • Restrict and monitor authenticated Web Bridge access, especially for user accounts that do not need it.
  • Review the Cisco vendor advisory referenced by NVD for vendor guidance and any environment-specific mitigations.
  • Investigate unexpected Web Bridge crashes or suspicious authenticated sessions as potential signs of abuse.

Evidence notes

The supplied NVD record states that the issue affects Cisco Meeting Server releases prior to 2.1.2, with known affected versions 2.0, 2.0.7, and 2.1, and a known fixed release of 2.1.2. It also states that an authenticated remote attacker with a valid Web Bridge session could retrieve memory contents and potentially cause a crash. The record includes CVSS v3.0 vector CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H and CWE-20. The Cisco vendor advisory is referenced in the source corpus, but its contents were not independently expanded here.

Official resources

Publicly disclosed in the supplied CVE record on 2017-02-22. The NVD entry was later modified on 2026-05-13, but that date is not the vulnerability's disclosure date.