CVE-2026-91249 Oracle Corporation CVE debrief

Who should care

System administrators and security teams responsible for Oracle Solaris 11.4 systems should assess exposure and prioritize patching. They should also verify patch application, monitor for suspicious activity, and review compensating controls for exposed systems.

Why it matters

CVE-2026-91249 is a low-severity vulnerability in Oracle Solaris 11.4 that allows unauthorized read access. Defenders should verify and apply patches, assess exposure, and monitor activity.

• Verify patch application to prevent unauthorized data access
• Assess exposure and prioritize patching for Oracle Solaris 11.4 systems
• Monitor for suspicious activity that could indicate exploitation attempts

Technical summary

The vulnerability in Oracle Solaris 11.4, with a CVSS score of 3.3, allows a low-privileged attacker with logon access to potentially read a subset of accessible data. The vulnerability is easily exploitable and has a CVSS vector of (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Solaris accessible data. Defenders should verify and apply Oracle's security patches for Oracle Solaris 11.4, assess exposure, and monitor for suspicious activity.

Defensive priority

Verify and apply Oracle's security patches for Oracle Solaris 11.4, assess exposure, and monitor for suspicious activity.

Recommended defensive actions

• Apply Oracle's security patches for Oracle Solaris 11.4
• Assess exposure and prioritize patching
• Monitor for suspicious activity
• Verify patch application to prevent unauthorized data access
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its CVSS score, and potential impacts. Oracle's security alert documentation is also available. The vulnerability affects Oracle Solaris 11.4 and has a CVSS vector of (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). Defenders should verify patch application, assess exposure, and monitor for suspicious activity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.