A vulnerability in the XCP Router service of the Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and the Cisco TeleP…

Published 8 y ago 2018-08-15 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.1 · NVD

CISA KEV

not known exploited

EPSS

3.4%

percentile 89%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 23 mo ago 2024-11-25

Exploit prediction (EPSS)

3.45% probability of exploitation in the next 30 days, higher than 89% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:N/A:P`

Affected products

Cisco Systems, Inc. Unified Communications Manager IM & Presence Service (CUCM IM&P)
Cisco Systems, Inc. TelePresence Video Communication Server (VCS) and Expressway

Classification

Weakness

CWE-20 Improper Input Validation
CWE-125 Out-of-bounds Read

References

securitytracker.com /id/1041534 · vdb-entry, x_refsource_SECTRACK, x_transferred
securityfocus.com /bid/105104 · vdb-entry, x_refsource_BID, x_transferred
tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-ucmimps-dos · vendor-advisory, x_refsource_CISCO, x_transferred
securitytracker.com /id/1041533 · vdb-entry, x_refsource_SECTRACK, x_transferred
securityfocus.com /bid/105102 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2018-0409
NVD: CVE-2018-0409

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary