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CVE-2026-88131 Microsoft CVE debrief

Microsoft Dataverse Remote Code Execution Vulnerability allows unauthorized code execution over a network due to deserialization of untrusted data. Defenders should assess exposure, prioritize remediation, and verify affected versions. This vulnerability impacts Microsoft Dataverse instances, requiring defenders to review and apply patches from Microsoft. The vulnerability's critical severity necessitates immediate attention from defenders to prevent potential unauthorized code execution.

Vendor
Microsoft
Product
Microsoft Dataverse
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-08
Original CVE updated
2026-10-10
Advisory published
2026-10-08
Advisory updated
2026-10-10

Who should care

Defenders of Microsoft Dataverse instances should assess exposure and prioritize remediation. This includes reviewing and applying patches from Microsoft, verifying affected versions, and ensuring the security of their Microsoft Dataverse instances. The vulnerability's critical severity requires immediate attention from defenders to prevent potential unauthorized code execution.

Why it matters

The vulnerability allows unauthorized code execution, requiring defenders to assess exposure, prioritize remediation, and verify affected versions.

  • Potential unauthorized code execution over the network
  • Required verification of affected Microsoft Dataverse versions
  • Need for prioritized remediation and patching

Technical summary

The vulnerability exists due to deserialization of untrusted data in Microsoft Dataverse, allowing an unauthorized attacker to execute code over a network. This vulnerability impacts Microsoft Dataverse instances, and defenders should review and apply patches from Microsoft to prevent potential unauthorized code execution. The vulnerability's technical details indicate a high level of severity, necessitating immediate attention from defenders.

Defensive priority

High

Recommended defensive actions

  • Assess exposure of Microsoft Dataverse instances to the network
  • Prioritize remediation of affected Microsoft Dataverse versions
  • Verify affected versions and apply patches from Microsoft

Evidence notes

The CVE record and source item provide details on the vulnerability. The NVD entry is currently not provided. Defenders should verify affected Microsoft Dataverse versions and apply patches from Microsoft. The vulnerability allows unauthorized code execution, requiring defenders to assess exposure and prioritize remediation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88131 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88131

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

  • CVE-2026-88131 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88131

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

Supplemental references

  • Microsoft Dataverse Remote Code Execution Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/88xxx/CVE-2026-88131.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88131

    Supplemental source - vendor-advisory, patch

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.