CVE-2018-15381

Cisco Unity Express Arbitrary Command Execution Vulnerability

CRITICAL
9.8
CVSS Score
Published: November 8, 2018 at 05:00 PM UTC
Updated: June 17, 2026 at 01:42 AM UTC
1 product affected across 1 vendorUnity Express

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Severity
CRITICAL9.8
Exploit prediction
EPSS 87%
SSVC
No known exploit

Description

A Java deserialization vulnerability in Cisco Unity Express (CUE) could allow an unauthenticated, remote attacker to execute arbitrary shell commands with the privileges of the root user. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a malicious serialized Java object to the listening Java Remote Method Invocation (RMI) service. A successful exploit could allow the attacker to execute arbitrary commands on the device with root privileges.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 9.0.6
Affected range stops below 9.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-502

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