CVE intelligence

CVE-2026-45504

Vulnerability intelligence

Published Jun 9, 2026Sources checked Nov 12, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-45504 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: Jun 23, 2026

Vendor remediation details

Install KB5103212. Install KB5103213. Install KB5103215. Install KB5103214.

Vendor-listed releases

15.02.2562.045
15.02.1748.048
15.01.2507.071
15.02.1544.043

CISA KEVNot listedBased on the latest collected catalog

EPSS1.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-45504?

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

Source: NVD