CVE-2025-64666— Microsoft Exchange Server Elevation of Privilege Vulnerability
Quick assessment
Affected
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
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 Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server存在输入验证错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Microsoft Exchange Server 2019 Cumulative Update 15,Microsoft Exchange Server 2016 Cumulative Update 23,Mic
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-64666
Vulnerability Information
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Vulnerability Title
Microsoft Exchange Server Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server存在输入验证错误漏洞。攻击者利用该漏洞可以提升权限。以下产品和版本受到影响：Microsoft Exchange Server 2019 Cumulative Update 15,Microsoft Exchange Server 2016 Cumulative Update 23,Mic
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 Server 2016 Cumulative Update 23 | 15.01.0.0 ~ 15.01.2507.063 | - |
|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 14 | 15.02.0.0 ~ 15.02.1544.037 | - |
|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 15 | 15.02.0.0 ~ 15.02.1748.042 | - |
|
| Microsoft | Microsoft Exchange Server Subscription Edition RTM | 15.02.0.0 ~ 15.02.2562.035 | - |
|
II. Public POCs for CVE-2025-64666
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2025-64666 (1)
Same Patch Batch · Microsoft · 2025-12-09 · 56 CVEs total
| CVE-2025-62456 | 8.8 HIGH | Windows Resilient File System (ReFS) Remote Code Execution Vulnerability |
| CVE-2025-62550 | 8.8 HIGH | Azure Monitor Agent Remote Code Execution Vulnerability |
| CVE-2025-62549 | 8.8 HIGH | Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability |
| CVE-2025-64672 | 8.8 HIGH | Microsoft SharePoint Server Spoofing Vulnerability |
| CVE-2025-64678 | 8.8 HIGH | Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability |
| CVE-2025-64671 | 8.4 HIGH | GitHub Copilot for Jetbrains Remote Code Execution Vulnerability |
| CVE-2025-62554 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2025-62557 | 8.4 HIGH | Microsoft Office Remote Code Execution Vulnerability |
| CVE-2025-55233 | 7.8 HIGH | Windows Projected File System Elevation of Privilege Vulnerability |
| CVE-2025-62467 | 7.8 HIGH | Windows Projected File System Elevation of Privilege Vulnerability |
| CVE-2025-62464 | 7.8 HIGH | Windows Projected File System Elevation of Privilege Vulnerability |
| CVE-2025-62474 | 7.8 HIGH | Windows Remote Access Connection Manager Elevation of Privilege Vulnerability |
| CVE-2025-62221 | 7.8 HIGH | Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability |
| CVE-2025-62552 | 7.8 HIGH | Microsoft Access Remote Code Execution Vulnerability |
| CVE-2025-62462 | 7.8 HIGH | Windows Projected File System Elevation of Privilege Vulnerability |
| CVE-2025-62553 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2025-54100 | 7.8 HIGH | PowerShell Remote Code Execution Vulnerability |
| CVE-2025-64679 | 7.8 HIGH | Windows DWM Core Library Elevation of Privilege Vulnerability |
| CVE-2025-64680 | 7.8 HIGH | Windows DWM Core Library Elevation of Privilege Vulnerability |
| CVE-2025-64661 | 7.8 HIGH | Windows Shell Elevation of Privilege Vulnerability |
Showing top 20 of 56 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Microsoft Exchange Server 2016 Cumulative Update 23
-
CVE-2026-69641
Microsoft Exchange Server Elevation of Privilege Vulnerabili -
CVE-2026-69380
Microsoft Exchange Server Elevation of Privilege Vulnerabili -
CVE-2026-69382
Microsoft Exchange Server Information Disclosure Vulnerabili -
CVE-2026-69378
Microsoft Exchange Server Denial of Service Vulnerability -
CVE-2026-69375
Microsoft Exchange Server Tampering Vulnerability
Same vendor: Microsoft
-
CVE-2026-100208
Microsoft Office Outlook Remote Code Execution Vulnerability -
CVE-2026-70125
Microsoft Office Outlook Remote Code Execution Vulnerability -
CVE-2026-88097
Microsoft Edge (Chromium-based) Elevation of Privilege Vulne -
CVE-2026-85887
M365 Copilot Information Disclosure Vulnerability -
CVE-2026-83946
Azure Portal Spoofing Vulnerability
V. Comments for CVE-2025-64666
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