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CVE-2026-26137— Microsoft Exchange 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 365 Copilot Business Chat是美国Microsoft公司的一个AI聊天软件。 Microsoft 365 Copilot Business Chat存在代码问题漏洞，该漏洞源于服务端请求伪造，可能导致经过授权的攻击者通过网络提升权限。

CVSS 9.9 · Critical EPSS 0.72% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
Microsoft Microsoft Exchange Online - affected
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I. Basic Information for CVE-2026-26137

Vulnerability Information
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Vulnerability Title
Microsoft Exchange Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Server-side request forgery (ssrf) in Microsoft Exchange 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:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft 365 Copilot Business Chat 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft 365 Copilot Business Chat是美国Microsoft公司的一个AI聊天软件。 Microsoft 365 Copilot Business Chat存在代码问题漏洞，该漏洞源于服务端请求伪造，可能导致经过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 Exchange Online - -

II. Public POCs for CVE-2026-26137

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III. Intelligence Information for CVE-2026-26137

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Vendor Advisories for CVE-2026-26137 (1)

Same Patch Batch · Microsoft · 2026-03-19 · 11 CVEs total

CVE-2026-32169 10.0 CRITICAL Azure Cloud Shell Elevation of Privilege Vulnerability
CVE-2026-32191 9.8 CRITICAL Microsoft Bing Images Remote Code Execution Vulnerability
CVE-2026-32194 9.8 CRITICAL Microsoft Bing Images Remote Code Execution Vulnerability
CVE-2026-26139 8.6 HIGH Microsoft Purview Elevation of Privilege Vulnerability
CVE-2026-26138 8.6 HIGH Microsoft Purview Elevation of Privilege Vulnerability
CVE-2026-23658 8.6 HIGH Azure DevOps: msazure Elevation of Privilege Vulnerability
CVE-2026-23659 8.6 HIGH Azure Data Factory Information Disclosure Vulnerability
CVE-2026-26120 6.5 MEDIUM Microsoft Bing Tampering Vulnerability
CVE-2026-26136 6.5 MEDIUM Microsoft Copilot Information Disclosure Vulnerability
CVE-2026-24299 5.3 MEDIUM M365 Copilot Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Microsoft Exchange Online
Same vendor: Microsoft
Same weakness: CWE-918

V. Comments for CVE-2026-26137

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