CVE-2026-66301

Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability

At a glance

Severity: MEDIUM 6.5
EPSS: EPSS 1.00 % · percentile 62 (2026-10-27)
State: PUBLISHED
Published: 2026-08-11
Updated: 2026-10-28
Assigner: microsoft
NVD status: Analyzed

Description

Exposure of sensitive information to an unauthorized actor in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to disclose information over a network.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C	microsoft
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	NVD · secure@microsoft.com (Secondary)

Weaknesses (CWE)

CWE-200

European references

ENISA EUVD · EUVD-2026-56566
GCVE · GCVE-0-2026-66301

CERT-FR advisories

CERTFR-2026-AVI-1004 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:on-premises:*:*:* ≥ 9.1 < 9.1.47.06

Affected products

Product	Versions
Microsoft · Microsoft Dynamics 365 (on-premises) version 9.1	affected 9.0 < 9.1.0047.0006

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66301

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD