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CVE-2026-55946— Microsoft Copilot Information Disclosure Vulnerability

Quick assessment

Affected
Microsoft Microsoft Copilot
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Copilot 中用于命令的特殊元素未进行正确中和（“命令注入”），允许未经授权的攻击者通过网络泄露信息。

CVSS 6.1 · Medium
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I. Basic Information for CVE-2026-55946

Vulnerability Information
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Vulnerability Title
Microsoft Copilot Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Copilot - -

II. Public POCs for CVE-2026-55946

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III. Intelligence Information for CVE-2026-55946

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Vendor Advisories for CVE-2026-55946 (1)

Same Patch Batch · Microsoft · 2026-09-17 · 18 CVEs total

CVE-2026-69843 10.0 CRITICAL Microsoft Fabric Elevation of Privilege Vulnerability
CVE-2026-62874 10.0 CRITICAL Azure Billing Elevation of Privilege Vulnerability
CVE-2026-69865 10.0 CRITICAL Microsoft Container Registry Elevation of Privilege Vulnerability
CVE-2026-85889 10.0 CRITICAL Azure AI Foundry Elevation of Privilege Vulnerability
CVE-2026-70200 10.0 CRITICAL Azure Logic Apps Elevation of Privilege Vulnerability
CVE-2026-83944 10.0 CRITICAL Azure Logic Apps Elevation of Privilege Vulnerability
CVE-2026-69399 10.0 CRITICAL Azure Arc Elevation of Privilege Vulnerability
CVE-2026-85878 9.9 CRITICAL Azure Database for PostgreSQL Elevation of Privilege Vulnerability
CVE-2026-85885 9.9 CRITICAL Microsoft 365 Copilot Elevation of Privilege Vulnerability
CVE-2026-87701 9.6 CRITICAL Azure Cosmos DB Elevation of Privilege Vulnerability
CVE-2026-70009 9.3 CRITICAL Azure Arc Elevation of Privilege Vulnerability
CVE-2026-77903 9.0 CRITICAL Microsoft Dataverse Elevation of Privilege Vulnerability
CVE-2026-68791 8.6 HIGH Azure Machine Learning Information Disclosure Vulnerability
CVE-2026-83946 8.2 HIGH Azure Portal Spoofing Vulnerability
CVE-2026-85887 7.7 HIGH M365 Copilot Information Disclosure Vulnerability
CVE-2026-85917 7.5 HIGH Azure AI Foundry Elevation of Privilege Vulnerability
CVE-2026-78501 7.4 HIGH Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Copilot
Same vendor: Microsoft
Same weakness: CWE-77

V. Comments for CVE-2026-55946

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