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Vulnerability record · CVE-2026-26133 · published 16 March 2026

CVE-2026-26133: Microsoft 365 copilot command injection vulnerability

Microsoft · 365 Copilot

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

7.1 CVSS 3.1 High EPSS 0.54% · top 56.7% CWE-77 · Command injection
7.1CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Affected products

10 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-26133), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.