Review reviewHigh

CVE-2026-40371

Microsoft Microsoft Dynamics 365 (on-premises) version 9.1, dynamics 365

Improper handling of insufficient permissions or privileges in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to elevate privileges over a network.

CVSS
8.8
EPSS
0.63%
46.7% percentile
CISA KEV
Not listed
Published
2026.06.10
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.63%
Technical severityCVSS 8.8

Vulnerability overview

Improper handling of insufficient permissions or privileges in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to elevate privileges over a network.

Affected product and versions

Product
Microsoft Microsoft Dynamics 365 (on-premises) version 9.1, dynamics 365
Affected versions
>= 9.0 < 9.1.0045.0011, >= 9.1 < 9.1.45.11
Fixed versions
9.1.45.11

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Microsoft Dynamics 365 (on-premises) version 9.1, dynamics 365 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-280, CWE-755
CVE-2026-40371 — Microsoft Microsoft Dynamics 365 (on-premises) version 9.1, dynamics 365 | SECUFOCUS NOW