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Vulnerability record · CVE-2018-0409 · published 15 August 2018

CVE-2018-0409: Cisco telepresence video communication server improper input validation vulnerability

Cisco · Telepresence Video Communication Server

A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM&P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.

7.5 CVSS 3.1 High EPSS 3.5% · top 11.3% CWE-20 · Improper input validationCWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score, v2 5.0
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and the Cisco TelePresence Video Communication Server (VCS) and Expressway could allow an unauthenticated, remote attacker to cause a temporary service outage for all IM&P users, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious IPv4 or IPv6 packet to an affected device on TCP port 7400. An exploit could allow the attacker to overread a buffer, resulting in a crash and restart of the XCP Router service. Cisco Bug IDs: CSCvg97663, CSCvi55947.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/105102 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/105104 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041533 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041534 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos Vendor Advisory
http://www.securityfocus.com/bid/105102 Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/105104 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041533 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041534 Third Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-0409), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.