CVE intelligence

CVE-2026-26133

Vulnerability intelligence

Published Mar 16, 2026Sources checked Oct 3, 2026

7.1HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-26133 and is rated High severity with a CVSS score of 7.1. 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

Release Notes Release Note

Vendor-listed releases

2.106.26020617
5.2605
2.107.2
145.3800.99
8.3.1
1.0.0.2026043102
16.0.19822.20038
16.0.19815.10000
2.2.260210.21290750
1.2.260302.2193910
16.0.19725.20142

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-26133?

AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.