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CVE-2026-69356— Microsoft Exchange Server Spoofing 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存在跨站脚本漏洞，该漏洞源于网页生成过程中输入中和不当（跨站脚本），可能导致未经授权的攻击者通过网络执行欺骗攻击。

CVSS 9.3 · Critical EPSS 0.70% · P51

Affected Version Matrix 4

VendorProduct Version RangeStatus
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 15.01.0.0< 15.01.2507.073 affected
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0< 15.02.1544.046 affected
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0< 15.02.1748.051 affected
Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0< 15.02.2562.049 affected
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I. Basic Information for CVE-2026-69356

Vulnerability Information
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Vulnerability Title
Microsoft Exchange Server Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing 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
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Server 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Exchange Server是美国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存在跨站脚本漏洞，该漏洞源于网页生成过程中输入中和不当（跨站脚本），可能导致未经授权的攻击者通过网络执行欺骗攻击。
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 ~ 15.01.2507.073 -
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 15.02.0.0 ~ 15.02.1544.046 -
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 15.02.0.0 ~ 15.02.1748.051 -
Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 ~ 15.02.2562.049 -

II. Public POCs for CVE-2026-69356

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III. Intelligence Information for CVE-2026-69356

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Vendor Advisories for CVE-2026-69356 (1)

Same Patch Batch · Microsoft · 2026-09-08 · 966 CVEs total

CVE-2026-83941 9.9 CRITICAL Entra ID Elevation of Privilege Vulnerability
CVE-2026-70296 9.8 CRITICAL Windows Imaging Component Remote Code Execution Vulnerability
CVE-2026-69408 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2026-69493 9.8 CRITICAL Windows Event Logging Service Remote Code Execution Vulnerability
CVE-2026-69910 9.8 CRITICAL Windows Hyper-V Remote Code Execution Vulnerability
CVE-2026-67643 9.8 CRITICAL Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-69431 9.8 CRITICAL Telnet Client Remote Code Execution Vulnerability
CVE-2026-69491 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-78509 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-78510 9.8 CRITICAL Microsoft Word Remote Code Execution Vulnerability
CVE-2026-69463 9.8 CRITICAL Windows NTFS Remote Code Execution Vulnerability
CVE-2026-69496 9.8 CRITICAL Windows Compressed Folder Remote Code Execution Vulnerability
CVE-2026-69590 9.8 CRITICAL Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
CVE-2026-69525 9.8 CRITICAL Remote Desktop Services Remote Code Execution Vulnerability
CVE-2026-69768 9.8 CRITICAL Windows RNDIS Remote Code Execution Vulnerability
CVE-2026-69595 9.8 CRITICAL Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
CVE-2026-69730 9.8 CRITICAL Windows DNS Server Remote Code Execution Vulnerability
CVE-2026-73009 9.8 CRITICAL Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVE-2026-73010 9.8 CRITICAL Microsoft Failover Cluster Remote Code Execution Vulnerability
CVE-2026-72979 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability

Showing top 20 of 966 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Microsoft Exchange Server 2016 Cumulative Update 23
Same vendor: Microsoft
Same weakness: CWE-79

V. Comments for CVE-2026-69356

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