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Vulnerabilities

Vulnerability · CVE-2026-88131

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

Published Oct 8, 2026 · catalog updated Oct 15, 2026 · Deserialization of untrusted data

Check if you run it

No confirmed exploitation is on record for CVE-2026-88131. EPSS is 0.82%. Act only if a listed version of Deserialization of untrusted data is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Deserialization of untrusted data).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.82%
Remediation
Advisory link
Affected products
cpe microsoft/dataverse

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/dataverseversion unspecified

How to fix CVE-2026-88131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-88131. EPSS is 0.82%. Act only if a listed version of Deserialization of untrusted data is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 0.82%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · NCSC Netherlands

    Detected

    Microsoft heeft kwetsbaarheden verholpen in diverse Dynamics componenten. Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade zoals benoemd in onderstaande tabellen: Microsoft Dataverse: |------------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |------------------|------|-----------------------

  2. Oct 15, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2026-88131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-88131

    30-day exploitation probability 0.8%

    first.org
  • NCSC NetherlandsGovernment advisoryCVE-2026-88131

    Microsoft heeft kwetsbaarheden verholpen in diverse Dynamics componenten. Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade zoals benoemd in onderstaande tabellen: Microsoft Dataverse: |------------------|---

    advisories.ncsc.nl
  • NIST NVDVulnerability recordCVE-2026-88131

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.