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TI-2026-69831 Aliases CVE-2026-88131

Microsoft Dataverse deserialization flaw allows remote code execution

Priority MEDIUM 51CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

Microsoft Dataverse contains a deserialization flaw (CWE-502) that mishandles untrusted data. An unauthorized attacker can execute code over the network without authentication or user interaction. The CVSS 3.1 base score is 9.8 (Critical).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01225 68th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Dataverse-—No fix listedCNA
  • Microsoft Dataverse VendorMicrosoft Affected - Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:dataverse:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:a:microsoft:dataverse:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

The sources list no fixed version for Microsoft Dataverse.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-88131
  2. 2026-10-10 CISA SSVC decision points changed

References

Patch 1

  • TI-2024-25423 Microsoft Dataverse Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-30218 Microsoft Dataverse Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-21215 Microsoft Dataverse Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-21233 Microsoft Dataverse Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-54232 Microsoft Dataverse Elevation of Privilege Vulnerability CVSS 3.1CRITICAL 9.0
  • TI-2025-17815 Microsoft Dataverse Elevation of Privilege Vulnerability CVSS 3.1HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences