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CVE-2026-33102— Microsoft 365 Copilot Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Microsoft 365 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 M365 Copilot是美国微软（Microsoft）公司的一个AI驱动的生产力工具。 Microsoft M365 Copilot存在输入验证错误漏洞，该漏洞源于URL重定向到不可信站点，可能导致未经授权的攻击者通过网络提升权限。

CVSS 9.3 · Critical EPSS 0.72% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft 365 Copilot - affected
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I. Basic Information for CVE-2026-33102

Vulnerability Information
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Vulnerability Title
Microsoft 365 Copilot Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft M365 Copilot 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft M365 Copilot是美国微软（Microsoft）公司的一个AI驱动的生产力工具。 Microsoft M365 Copilot存在输入验证错误漏洞，该漏洞源于URL重定向到不可信站点，可能导致未经授权的攻击者通过网络提升权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft 365 Copilot - -

II. Public POCs for CVE-2026-33102

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III. Intelligence Information for CVE-2026-33102

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Same Patch Batch · Microsoft · 2026-04-23 · 7 CVEs total

CVE-2026-35431 10.0 CRITICAL Microsoft Entra ID Entitlement Management Spoofing Vulnerability
CVE-2026-33819 10.0 CRITICAL Microsoft Bing Remote Code Execution Vulnerability
CVE-2026-24303 9.6 CRITICAL Microsoft Partner Center Elevation of Privilege Vulnerability
CVE-2026-32210 9.3 CRITICAL Microsoft Dynamics 365 (online) Spoofing Vulnerability
CVE-2026-26150 8.6 HIGH Microsoft Purview eDiscovery Elevation of Privilege Vulnerability
CVE-2026-32172 8.0 HIGH Microsoft Power Apps Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft 365 Copilot
Same vendor: Microsoft
Same weakness: CWE-601

V. Comments for CVE-2026-33102

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