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Vulnerability record · CVE-2026-55145 · published 14 July 2026

CVE-2026-55145: Microsoft copilot command injection vulnerability

Microsoft · Copilot

Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.

7.1 CVSS 3.1 High EPSS 0.53% · top 57.8% CWE-77 · Command injection
7.1CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
22 Jul 2026Last modified by NVD

Description

Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.

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

Affected products

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

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55145 Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-55145), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.