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CVE-2018-0409

26
FAUCET Score

CVE-2018-0409 describes a denial-of-service vulnerability in the XCP Router service of Cisco Unified Communications Manager IM & Presence Service (CUCM IM&P) and Cisco TelePresence Video Communication Server (VCS) and Expressway. An unauthenticated, remote attacker can exploit improper input validation by sending a crafted IPv4 or IPv6 packet to TCP port 7400, causing a buffer over-read, service crash, and temporary outage for IM&P users. This vulnerability has a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
x7.0.1CPE matchmatch criteria
cpe:2.3:a:cisco:telepresence_video_communication_server:x7.0.1:*:*:*:*:*:*:*
x7.2.4CPE matchmatch criteria
cpe:2.3:a:cisco:telepresence_video_communication_server:x7.2.4:*:*:*:*:*:*:*
x8.1CPE matchmatch criteria
cpe:2.3:a:cisco:telepresence_video_communication_server:x8.1:*:*:*:*:*:*:*
x8.2.2CPE matchmatch criteria
cpe:2.3:a:cisco:telepresence_video_communication_server:x8.2.2:*:*:*:*:*:*:*
x8.5CPE matchmatch criteria
cpe:2.3:a:cisco:telepresence_video_communication_server:x8.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.49%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0349 is in the 79th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

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