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CVE-2026-69646— Skype for Business Spoofing Vulnerability

Quick assessment

Affected
Microsoft Skype for Business Server 2015 CU13
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 Skype for Business Server是美国Microsoft公司的一款企业级即时通讯与协作服务器软件。 Microsoft Skype for Business Server 2015 CU13 6.0.9319.885之前版本、Skype for Business Server 2019 CU8 7.0.2046.569之前版本和Skype for Business Server Subscription Edition CU1 7.0.2046.879之前版本存在加密

CVSS 8.3 · High EPSS 0.32% · P24

Affected Version Matrix 3

VendorProduct Version RangeStatus
Microsoft Skype for Business Server 2015 CU13 9319.0< 6.0.9319.885 affected
Microsoft Skype for Business Server 2019 CU8 2046.0< 7.0.2046.569 affected
Microsoft Skype for Business Server Subscription Edition CU1 2046.0< 7.0.2046.879 affected
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I. Basic Information for CVE-2026-69646

Vulnerability Information
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Vulnerability Title
Skype for Business Spoofing Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper verification of cryptographic signature in Skype for Business allows an unauthorized attacker to perform spoofing over an adjacent network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Skype for Business Server 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Skype for Business Server是美国Microsoft公司的一款企业级即时通讯与协作服务器软件。 Microsoft Skype for Business Server 2015 CU13 6.0.9319.885之前版本、Skype for Business Server 2019 CU8 7.0.2046.569之前版本和Skype for Business Server Subscription Edition CU1 7.0.2046.879之前版本存在加密
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 Skype for Business Server 2015 CU13 9319.0 ~ 6.0.9319.885 -
Microsoft Skype for Business Server 2019 CU8 2046.0 ~ 7.0.2046.569 -
Microsoft Skype for Business Server Subscription Edition CU1 2046.0 ~ 7.0.2046.879 -

II. Public POCs for CVE-2026-69646

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III. Intelligence Information for CVE-2026-69646

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Vendor Advisories for CVE-2026-69646 (1)

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

CVE-2026-83941 9.9 CRITICAL Entra ID Elevation of Privilege Vulnerability
CVE-2026-69579 9.8 CRITICAL Windows Message Queuing Remote Code Execution Vulnerability
CVE-2026-69824 9.8 CRITICAL Microsoft Standard XPS Remote Code Execution Vulnerability
CVE-2026-69586 9.8 CRITICAL Microsoft Windows PDF Remote Code Execution Vulnerability
CVE-2026-73025 9.8 CRITICAL Windows iSCSI Security Feature Bypass Vulnerability
CVE-2026-69496 9.8 CRITICAL Windows Compressed Folder Remote Code Execution Vulnerability
CVE-2026-69845 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-69829 9.8 CRITICAL Windows Shell Remote Code Execution Vulnerability
CVE-2026-69769 9.8 CRITICAL Windows HTTP Print Provider Remote Code Execution Vulnerability
CVE-2026-72979 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-78509 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-72983 9.8 CRITICAL Internet Connection Sharing (ICS) Remote Code Execution Vulnerability
CVE-2026-69276 9.8 CRITICAL Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability
CVE-2026-72982 9.8 CRITICAL Windows Netlogon Remote Code Execution Vulnerability
CVE-2026-69910 9.8 CRITICAL Windows Hyper-V Remote Code Execution Vulnerability
CVE-2026-69431 9.8 CRITICAL Telnet Client 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-2026-69491 9.8 CRITICAL Microsoft DirectMusic Remote Code Execution Vulnerability
CVE-2026-68839 9.8 CRITICAL Windows USB Mass Storage Class Driver Remote Code Execution Vulnerability

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

IV. Related Vulnerabilities

Same product: Skype for Business Server 2015 CU13
Same vendor: Microsoft
Same weakness: CWE-347

V. Comments for CVE-2026-69646

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