What is CVE-2026-65668?

CVE-2026-65668 is a high-severity vulnerability in Microsoft Purview Ediscovery, classified under Improper Access Control. CVSS score: 8.8/10. Published 2026-08-07.

How severe is CVE-2026-65668?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Purview Ediscovery

CVE-2026-65668

Improper access control in Microsoft Purview eDiscovery allows an authorized attacker to elevate privileges over a network.

Published 2026-08-07 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65668 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-65668?: CVE-2026-65668 is a high-severity vulnerability in Microsoft Purview Ediscovery, classified under Improper Access Control. CVSS score: 8.8/10. Published 2026-08-07.
How severe is CVE-2026-65668?: High severity. CVSS v3 base score is 8.8 out of 10.