CVE-2026-87423

Analyzed Analyzed - Analysis Complete

Oracle Solaris X Window System Privilege Escalation

Publication date: 2026-10-20

Last updated on: 2026-11-09

Assigner: Oracle

Description

Vulnerability in the Oracle Solaris product of Oracle Systems (component: X Window System). The supported version that is affected is 11.4. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Solaris accessible data as well as unauthorized read access to a subset of Oracle Solaris accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Solaris. CVSS 3.1 Base Score 4.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-20

Last Modified

2026-11-09

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-87423

EUVD

EUVD-2026-106462

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	solaris	11.4

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Solaris 11.4's X Window System component. It allows a low-privileged attacker with local access to potentially modify, delete, or read some data on the system and cause a partial denial of service. The attack is difficult to execute but could impact confidentiality, integrity, and availability.

Detection Guidance

Detection of this vulnerability requires checking for affected versions of Oracle Solaris, specifically version 11.4. Review system logs for unusual activity related to the X Window System component. Ensure all patches for CVE-2026-87423 are applied if available.

Impact Analysis

If exploited, this vulnerability could let an attacker with local access gain unauthorized access to data, alter or delete it, or disrupt system operations partially. This may lead to data breaches, data corruption, or service disruptions on affected Oracle Solaris systems.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate compliance requirements under GDPR (data protection) or HIPAA (health data security). Organizations using Oracle Solaris 11.4 may face regulatory penalties if this flaw is exploited and leads to data exposure or integrity issues.

Mitigation Strategies

Apply the latest Oracle Solaris patches from Oracle to address the X Window System vulnerability. Monitor Oracle's security advisories for updates and restrict user privileges to minimize attack surface.

Hi! I’m here to help you understand CVE-2026-87423. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70

EPSS Chart

Security Radar

News mentioning this vulnerability

Loading related security news...