CVE-2026-91336

Analyzed Analyzed - Analysis Complete

Oracle Solaris Critical Data Modification Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-11-09

Assigner: Oracle

Description

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility). The supported version that is affected is 11.4. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. While the vulnerability is in Oracle Solaris, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Solaris accessible data. CVSS 3.1 Base Score 6.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N).

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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-2026-91336

EUVD

EUVD-2026-106590

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	solaris	11.4

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Solaris 11.4 where a low-privileged attacker with local access can exploit it to compromise the system. It allows unauthorized creation, deletion, or modification of critical data or all accessible data on Oracle Solaris.

Detection Guidance

Detection of CVE-2026-91336 requires checking for unauthorized modifications to critical data on Oracle Solaris 11.4 systems. Review system logs for unusual file changes, especially in directories with sensitive data. Use commands like 'find / -type f -mtime -1 -exec ls -la {} \;' to identify recently modified files. Check for unexpected user activity with 'last' or 'who' commands.

Impact Analysis

An attacker could gain control over critical data, leading to data loss, corruption, or unauthorized changes. This could disrupt operations, leak sensitive information, or allow further attacks on systems relying on Oracle Solaris.

Compliance Impact

This vulnerability could lead to unauthorized data modification or deletion, violating integrity requirements in GDPR and HIPAA. Non-compliance risks include fines, legal penalties, and loss of trust due to compromised data integrity.

Mitigation Strategies

Apply the latest Oracle Solaris patches from Oracle as soon as they become available. Monitor Oracle's security advisories for updates specific to CVE-2026-91336. Restrict user privileges to minimize potential impact if exploited.

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EPSS Chart

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