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PatchSiren cyber security CVE debrief

CVE-2026-59115 Microsoft CVE debrief

Microsoft Entra Provisioning Service Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges over a network. The vulnerability is rated as Critical with a CVSS score of 9.9. The CVE record was published on 2026-08-06T22:37:40.751Z and was last modified on 2026-10-08T18:09:47.328Z. This vulnerability affects Microsoft Entra Provisioning Service instances, and defenders should assess exposure and prioritize patching. The CVE record and source item provide limited information about the vulnerability.

Vendor
Microsoft
Product
Microsoft Entra Provisioning Service
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-06
Original CVE updated
2026-10-08
Advisory published
2026-08-06
Advisory updated
2026-10-08

Who should care

Defenders responsible for Microsoft Entra Provisioning Service instances should assess exposure and prioritize patching. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify and patch affected instances to prevent privilege elevation.

Why it matters

CVE-2026-59115 is a Critical elevation of privilege vulnerability in Microsoft Entra Provisioning Service. Defenders should prioritize verifying and patching affected instances to prevent potential exploitation.

  • Verify and patch affected Microsoft Entra Provisioning Service instances to prevent privilege elevation
  • Monitor for potential privilege elevation attempts to detect possible exploitation
  • Review and update incident response plans to address potential exploitation

Technical summary

The Microsoft Entra Provisioning Service Elevation of Privilege Vulnerability allows an authorized attacker to elevate privileges over a network. The vulnerability is rated as Critical with a CVSS score of 9.9. This vulnerability affects Microsoft Entra Provisioning Service instances. Defenders should prioritize verifying and patching affected instances to prevent potential exploitation.

Defensive priority

Defenders should prioritize verifying and patching affected Microsoft Entra Provisioning Service instances.

Recommended defensive actions

  • Verify and patch affected Microsoft Entra Provisioning Service instances
  • Monitor for potential privilege elevation attempts
  • Review and update incident response plans

Evidence notes

The CVE record and source item provide limited information about the vulnerability, but indicate that it affects Microsoft Entra Provisioning Service.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-59115 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-59115

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-59115 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-59115

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.