CVE-2017-3842 Cisco CVE debrief

Who should care

Administrators and security teams responsible for Cisco Intrusion Prevention System Device Manager (IDM), especially environments running the affected release 7.2(1)V7, should review exposure and access controls. Because the issue is unauthenticated and network-reachable, internet-facing or broadly reachable management interfaces deserve priority attention.

Technical summary

The vulnerability is described as a web-based management interface information disclosure in Cisco IDM. The exposed data is stored in HTML comments, which can be retrieved by an unauthenticated remote attacker. The NVD entry maps the issue to CWE-200 and lists the affected CPE as Cisco Intrusion Prevention System Device Manager 7.2(1)V7.

Defensive priority

Medium priority. The issue does not indicate code execution or service disruption, but it can leak sensitive information without authentication over the network. Exposure of management interfaces should be reduced and any affected deployment should be reviewed promptly.

Recommended defensive actions

• Identify whether Cisco Intrusion Prevention System Device Manager is deployed and confirm whether version 7.2(1)V7 is in use.
• Restrict access to the IDM web management interface to trusted administrative networks and review any unnecessary exposure.
• Apply Cisco's guidance from the vendor advisory referenced in the source corpus and verify whether an update, workaround, or configuration change is available.
• Review the interface for any sensitive data embedded in HTML comments or other client-visible markup.
• If the management interface must remain online, monitor access logs for unexpected requests to administrative pages and suspicious enumeration behavior.

Evidence notes

Source evidence in the supplied corpus consistently describes an unauthenticated remote information disclosure in Cisco IDM, with sensitive data exposed in HTML comments. NVD classifies the issue as CWE-200 and provides the CVSS 3.0 vector AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. The CVE was published on 2017-02-22; the later 2026-05-13 modified timestamp is database metadata and not the original disclosure date.

Official resources