CVE-2026-59119 Microsoft CVE debrief

Who should care

Defenders responsible for PowerShell deployments, particularly those using affected versions, should assess exposure and prioritize remediation.

Why it matters

CVE-2026-59119 is a high-severity elevation of privilege vulnerability in Microsoft PowerShell. Defenders should prioritize verifying and remediating vulnerable PowerShell versions to prevent local privilege escalation.

• Verify and remediate vulnerable PowerShell versions to prevent local privilege escalation
• Implement least privilege access controls to limit the attack surface
• Monitor for local privilege escalation attempts to detect potential exploitation

Technical summary

The vulnerability is caused by incorrect default permissions in Microsoft PowerShell, allowing an authorized attacker to elevate privileges locally. The vulnerability affects Microsoft PowerShell, and defenders should prioritize verifying and remediating vulnerable PowerShell versions to prevent local privilege escalation. The CVE record and source item provide details on the vulnerability and affected PowerShell versions. The vulnerability allows an attacker to elevate privileges locally, and defenders should implement least privilege access controls to limit the

Defensive priority

Defenders should prioritize verifying and remediating vulnerable PowerShell versions.

Recommended defensive actions

• Verify and remediate vulnerable PowerShell versions
• Implement least privilege access controls
• Monitor for local privilege escalation attempts

Evidence notes

The CVE record and source item provide details on the vulnerability and affected PowerShell versions. The vulnerability is caused by incorrect default permissions in Microsoft PowerShell, allowing an authorized attacker to elevate privileges locally. Defenders should prioritize verifying and remediating vulnerable PowerShell versions to prevent local privilege escalation. The source item provides details on the vulnerability and affected versions. Evidence is limited to publicly known,

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.