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CVE-2026-48582— Microsoft Exchange Online Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Microsoft Exchange Online
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 Microsoft Exchange Online是美国Microsoft公司的邮件安全产品。 Microsoft Exchange Online存在授权问题漏洞，该漏洞源于授权缺失，可能导致授权攻击者提升网络权限。

CVSS 9.6 · Critical EPSS 0.69% · P51

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Exchange Online - affected
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I. Basic Information for CVE-2026-48582

Vulnerability Information
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Vulnerability Title
Microsoft Exchange Online Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Online 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Microsoft Exchange Online是美国Microsoft公司的邮件安全产品。 Microsoft Exchange Online存在授权问题漏洞，该漏洞源于授权缺失，可能导致授权攻击者提升网络权限。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Microsoft Exchange Online - -

II. Public POCs for CVE-2026-48582

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III. Intelligence Information for CVE-2026-48582

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Vendor Advisories for CVE-2026-48582 (1)

Same Patch Batch · Microsoft · 2026-06-19 · 8 CVEs total

CVE-2026-45480 10.0 CRITICAL Azure Active Directory Elevation of Privilege Vulnerability
CVE-2026-48584 9.9 CRITICAL Microsoft Azure Synapse Elevation of Privilege Vulnerability
CVE-2026-32208 8.8 HIGH Microsoft Entra ID Spoofing Vulnerability
CVE-2026-47645 8.8 HIGH Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability
CVE-2026-42895 6.5 MEDIUM Microsoft Copilot Tampering Vulnerability
CVE-2026-50519 6.5 MEDIUM Microsoft Visual Studio Code CoPilot Chat Security Feature Bypass Vulnerability
CVE-2026-49336 @microsoft/kiota-http-fetchlibrary: Bearer token and Cookie leak across origin on redirect

IV. Related Vulnerabilities

Same product: Microsoft Exchange Online
Same vendor: Microsoft
Same weakness: CWE-862

V. Comments for CVE-2026-48582

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