CVE intelligence

CVE-2026-65813

Vulnerability intelligence

Published Aug 11, 2026Sources checked Oct 28, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-65813 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

Vendor revision: Aug 28, 2026

Vendor remediation details

Install KB5121573. Install KB5121576. Install KB5121574. Install KB5121575.

Vendor-listed releases

15.02.2562.046
15.01.2507.072
15.02.1748.049
15.02.1544.044

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-2026-65813?

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Source: NVD