PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-83941 Microsoft CVE debrief

CVE-2026-83941 is a critical vulnerability in Microsoft Entra ID that allows an authorized attacker to elevate privileges over a network due to missing authorization. This vulnerability, with a CVSS score of 9.9, is classified under CWE-862. Defenders managing Entra ID deployments should assess exposure and prioritize mitigation due to the critical nature of this vulnerability. The vulnerability's impact includes potential privilege elevation, requiring immediate mitigation and monitoring for exploitation attempts.

Vendor
Microsoft
Product
Microsoft Entra
CVSS
CRITICAL 9.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-16
Advisory published
2026-09-08
Advisory updated
2026-09-16

Who should care

Defenders managing Entra ID deployments should assess exposure and prioritize mitigation due to the critical nature of this vulnerability. This includes verifying Entra ID deployments for exposure, applying vendor-provided patches or mitigations, and monitoring for potential exploitation attempts. Security teams and operators managing Entra ID should review the vulnerability's impact and take necessary actions to to

Why it matters

CVE-2026-83941 is a critical vulnerability in Microsoft Entra ID that allows an authorized attacker to elevate privileges over a network due to missing authorization. Defenders managing Entra ID deployments should assess exposure and prioritize mitigation.

  • Defenders need to verify Entra ID deployments for exposure
  • Potential privilege elevation requires immediate mitigation
  • Monitoring for exploitation attempts is crucial

Technical summary

CVE-2026-83941 is a critical vulnerability in Microsoft Entra ID, with a CVSS score of 9.9. It allows an authorized attacker to elevate privileges over a network due to missing authorization. The vulnerability is described as CWE-862. Defenders should prioritize verifying and mitigating this vulnerability, especially those managing Entra ID deployments. The CVE record and NVD entry provide details on the vulnerability.

Defensive priority

Defenders should prioritize verifying and mitigating this vulnerability, especially those managing Entra ID deployments.

Recommended defensive actions

  • Verify Entra ID deployments for exposure to this vulnerability
  • Apply vendor-provided patches or mitigations
  • Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its critical CVSS score of 9.9 and the missing authorization issue in Entra ID.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83941 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83941

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

  • CVE-2026-83941 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83941

    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.