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CVE-2018-15381

77
FAUCET Score

CVE-2018-15381 is a critical Java deserialization vulnerability in Cisco Unity Express (CUE) that allows an unauthenticated, remote attacker to execute arbitrary shell commands with root privileges. The vulnerability has a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and complete compromise of confidentiality, integrity, and availability. While no public exploit intelligence or active exploitation is reported, its high EPSS and FAUCET Risk Score indicate a significant potential for future exploitation. Community discussion and media coverage are minimal, which is typical for most CVEs.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.0.6CPE matchmatch criteria
cpe:2.3:a:cisco:unity_express:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
87.25%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.8725 is in the 99th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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-20181107-cue
Vendor Advisory
securityfocus.com / bid/105876
Third Party AdvisoryVDB Entry
securitytracker.com / id/1042130
Third Party AdvisoryVDB Entry