---
title: "CVE-2026-91253: Oracle Solaris - Privilege Escalation"
description: "Oracle Solaris 11.4 contains a privilege escalation vulnerability caused by a kernel flaw, letting low privileged logged-in attackers take over the system, exploit requires attacker login."
url: https://panop.io/threat-heartbeat/CVE-2026-91253/
---

# CVE-2026-91253 Oracle Solaris - Privilege Escalation

Oracle Solaris 11.4 contains a privilege escalation vulnerability caused by a kernel flaw, letting low privileged logged-in attackers take over the system, exploit requires attacker login.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91253)

## Details

Type

Privilege Escalation

Impact

Privilege Escalation

CVSS vector

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

Published

20 October 2026

Updated

21 October 2026

## Vendor fix

Update to the latest Oracle Solaris 11.4 version with security patches.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91253](https://nvd.nist.gov/vuln/detail/CVE-2026-91253)
- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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