CVE-2026-88131CWE-502insecure-deserialization

CVE-2026-88131

Critical · published October 9, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
56.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00823 · 56.9th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-10-09T03:17Z
Affected products (1)
ProductVersionsFixed in
microsoft/dataverseall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88131 · [email protected]
EPSS history
Timeline
  • 10 OCT 03:32Z
    EPSS moved — → 1%
    epss
  • 08 OCT 22:15Z
    Microsoft Dataverse Remote Code Execution Vulnerability
    cvelistv5
  • 08 OCT 22:15Z
    Microsoft Dataverse Remote Code Execution Vulnerability
    cvelistv5