CVE-2026-88131: CWE-502: Deserialization of Untrusted Data in Microsoft Microsoft Dataverse
Description
CVE-2026-88131 is a critical vulnerability in Microsoft Dataverse involving deserialization of untrusted data. This flaw allows an unauthorized attacker to execute arbitrary code remotely without any user interaction or privileges. The vulnerability has a CVSS score of 9.8, indicating high severity with complete confidentiality, integrity, and availability impact. An official fix is available from Microsoft.
CVSS v3.1
Score 9.8critical
Affected software
Microsoft
Microsoft Dataverse
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-502) in Microsoft Dataverse arises from improper handling of untrusted serialized data, enabling remote code execution by an unauthenticated attacker over the network. The CVSS 3.1 vector indicates the attack requires no privileges or user interaction and affects confidentiality, integrity, and availability. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation allows remote, unauthenticated attackers to execute arbitrary code on the affected system, potentially leading to full system compromise including data theft, modification, or denial of service.
Mitigation Recommendations
Apply the official patch provided by Microsoft as detailed in their security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88131. This vulnerability is addressed by an official fix; therefore, updating to the patched version fully mitigates the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.397Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88131","vendor":"Microsoft"}]
Threat ID: 6ac81a602cdf04f6563e4d07
Added to database: 10/08/2026, 22:34:08 UTC
Last enriched: 10/08/2026, 22:48:21 UTC
Last updated: 10/08/2026, 22:49:04 UTC
Views: 15
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