CVE intelligence

CVE-2026-69641

Vulnerability intelligence

Published Sep 8, 2026Sources checked Oct 28, 2026

9.1CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-69641 and is rated Critical severity with a CVSS score of 9.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Sep 8, 2026

Vendor remediation details

Install KB5121611. Install KB5121609. Install KB5121610. Install KB5121608.

Vendor-listed releases

15.01.2507.073
15.02.1748.051
15.02.1544.046
15.02.2562.049

CISA KEVNot listedBased on the latest collected catalog

EPSS0.9%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-69641?

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Source: NVD