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NVD and CVE databases (CVETodo, cve.imfht.com, Rapid7) confirm the Oct 8, 2026 disclosure of critical CVE-2026-88131 in Microsoft Dataverse (CVSS 9.8 RCE via deserialization).

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Home/Tech/Critical CVE-2026-88131 hits Microsoft Dataverse with remote code execution
VERIFIEDBy Xavier Rivera· ·1 min read

Critical CVE-2026-88131 hits Microsoft Dataverse with remote code execution

Microsoft Dataverse is affected by critical vulnerability CVE-2026-88131, which allows remote code execution. The flaw scores 9.8 on CVSS; Microsoft says it has already fully mitigated it and customers have nothing to patch.

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Critical CVE-2026-88131 hits Microsoft Dataverse with remote code execution
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TL;DRAI · 60 sec read

Microsoft Dataverse has a critical vulnerability, CVE-2026-88131, that allows remote code execution via deserialization of untrusted data. The issue scores 9.8 on CVSS, with network access and no authentication needed. Microsoft says it has already fully mitigated the flaw in the cloud service, so customers need to take no action.

⚐ CORRECTED 

Wrong: told organizations to apply fixes and said administrators faced immediate patching requirements. Right: Microsoft says it has already fully mitigated this cloud-service flaw and there is no action for customers to take.

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Microsoft Dataverse contains a critical vulnerability that permits remote code execution by an unauthorized attacker.
An attacker could exploit deserialization of untrusted data to run arbitrary code over a network connection.
The flaw carries a CVSS score of 9.8. The vector shows network access with no authentication or user interaction required.

An attacker could exploit deserialization of untrusted data to run arbitrary code over a network connection. The CVSS vector rates the impact on confidentiality, integrity, and availability as high.
Microsoft says no customer action is needed.
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Microsoft says no customer action is needed. Its Security Update Guide entry for CVE-2026-88131 says the vulnerability has already been fully mitigated by Microsoft and there is no action for users of the service to take. Microsoft publishes CVEs for cloud-service flaws like this one for transparency, and it lists this one as not publicly disclosed and not exploited.

EXPERT TAKE

Microsoft has already fixed this on its side, so Dataverse customers have nothing to patch.

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