CVE intelligence

CVE-2026-96940

Vulnerability intelligence

Published Oct 2, 2026Sources checked Oct 3, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-96940 and is rated High severity with a CVSS score of 8.8. 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

Install KB5129957. Install KB5129958. Install KB5129955. Install KB5129956.

Vendor-listed releases

15.02.1544.048
15.01.2507.075
15.02.2562.053
15.02.1748.053

CISA KEVNot listedBased on the latest collected catalog

EPSSUnavailableNo current score collected

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-96940?

Weak authorization in Microsoft Exchange Server allows an authenticated attacker to elevate privileges over a network.