What is CVE-2018-0139?

CVE-2018-0139 is a high-severity vulnerability in Cisco Unified Customer Voice Portal, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-02-22.

How severe is CVE-2018-0139?

High severity. CVSS v3 base score is 8.6 out of 10.

Improper input validation in Cisco Unified Customer Voice Portal

CVE-2018-0139

A vulnerability in the Interactive Voice Response (IVR) management connection interface for Cisco Unified Customer Voice Portal (CVP) could allow an unauthenticated, remote attacker to cause the IVR connection to disconnect, creating a system-wide denial of service (DoS) condition. The vulnerability is due to improper handling of a TCP connection request when the IVR connection is already established. An attacker could exploit this vulnerability by initiating a crafted connection to the IP address of the targeted CVP device. An exploit could allow the attacker to disconnect the IVR to CVP connection, creating a DoS condition that prevents the CVP from accepting new, incoming calls while the IVR automatically attempts to re-establish the connection to the CVP. This vulnerability affects Cisco Unified Customer Voice Portal (CVP) Software Release 11.5(1). Cisco Bug IDs: CSCve70560.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-02-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.023 (83.2th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Cisco Unified Customer Voice Portal — versions 11.5\(1\), 11.6, 11.5(1)
Cisco Unified Customer Voice Portal — versions Cisco Unified Customer Voice Portal

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221… (Vendor Advisory)
www.securityfocus.com/bid/103124 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1040414 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0139?: CVE-2018-0139 is a high-severity vulnerability in Cisco Unified Customer Voice Portal, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-02-22.
How severe is CVE-2018-0139?: High severity. CVSS v3 base score is 8.6 out of 10.