Vulnerability in Microsoft Dataverse

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.8

[ Description ]Official description

Deserialization of untrusted data in Microsoft Dataverse allows an unauthorized attacker to execute code over a network.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL13 Oct 2026NCSC-2026-0424

  Vulnerabilities fixed in Microsoft Dynamics Translated from Dutch

  Probability/damage M/HCVE-2026-102848CVE-2026-100214CVE-2026-102226+3 more CVEs
• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3832

  Microsoft Dataverse: Vulnerability allows code execution Translated from German

  CVE-2026-88131

[ References ]References

• msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88131Vendor Advisory