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CVE-2026-88131 is an untrusted-data deserialization vulnerability in Microsoft Dataverse that allows an unauthenticated attacker to execute code over a network without user interaction. The vulnerability affects a hosted service. Specific vulnerable functions and affected version identifiers are not available. Microsoft has completed service-side remediation.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An untrusted-data deserialization vulnerability in Microsoft Dataverse allows an unauthorized attacker to execute code remotely over a network.
A remote code execution vulnerability in Microsoft Dataverse caused by deserialization of untrusted data. The listed CVSS v3.1 vector indicates network exploitation with low complexity, no privileges or user interaction required, and high confidentiality, integrity, and availability impacts. The record was received on October 8, 2026, and tagged as an exclusively hosted service.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.