CVE-2018-0409

Name: CVE-2018-0409
Creator: NVD / NIST
Published: 2018-08-15T20:29:00.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.49%

Last modified Jun 17, 2026

CVE-2018-0409 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 3.49% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.49%

87.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Telepresence Video Communication Server	x7.0.1
Cisco	Telepresence Video Communication Server	x7.2.4
Cisco	Telepresence Video Communication Server	x8.1
Cisco	Telepresence Video Communication Server	x8.2.2
Cisco	Telepresence Video Communication Server	x8.5
Cisco	Telepresence Video Communication Server	x8.6
Cisco	Telepresence Video Communication Server	x8.7
Cisco	Telepresence Video Communication Server	x8.8
Cisco	Telepresence Video Communication Server	x8.9
Cisco	Telepresence Video Communication Server	x8.10
Cisco	Telepresence Video Communication Server	x8.10.4
Cisco	Unified Communications Manager Im And Presence Service	11.5
Cisco	Unified Communications Manager Im And Presence Service	11.5\(1\)

References

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

Timeline

Published: Aug 15, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0409?

How severe is CVE-2018-0409?

CVE-2018-0409 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.49% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0409?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0409?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST