CVE-2026-85873— Skype for Business Elevation of Privilege 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.
Skype for Business 和 Microsoft Lync 中存在授权不当漏洞，允许经过身份验证的攻击者通过网络提升权限。
Possible ATT&CK Techniques 2 AI
T1068 · Exploitation for Privilege Escalation T1078 · Valid AccountsAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Skype for Business Server 2015 CU13 | 9319.0< 6.0.9319.886 |
affected |
| Microsoft | Skype for Business Server 2019 CU8 | 2046.0< 7.0.2046.583 |
affected |
| Microsoft | Skype for Business Server Subscription Edition CU1 | 2046.0< 7.0.2046.889 |
affected |
| Microsoft | Skype for Business Server Subscription Edition RTM | 1.0.0< 7.0.2046.889 |
affected |
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I. Basic Information for CVE-2026-85873
Vulnerability Information
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Vulnerability Title
Skype for Business Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper authorization in Skype for Business and Microsoft Lync 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:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Skype for Business Server 2015 CU13 | 9319.0 ~ 6.0.9319.886 | - |
|
| Microsoft | Skype for Business Server 2019 CU8 | 2046.0 ~ 7.0.2046.583 | - |
|
| Microsoft | Skype for Business Server Subscription Edition CU1 | 2046.0 ~ 7.0.2046.889 | - |
|
| Microsoft | Skype for Business Server Subscription Edition RTM | 1.0.0 ~ 7.0.2046.889 | - |
|
II. Public POCs for CVE-2026-85873
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-85873 (1)
Same Patch Batch · Microsoft · 2026-10-13 · 1407 CVEs total
| CVE-2026-83693 | 9.8 CRITICAL | Windows Error Reporting Remote Code Execution Vulnerability |
| CVE-2026-84015 | 9.8 CRITICAL | Remote Access Point-to-Point Protocol (PPP) EAP-TLS Remote Code Execution Vulnerability |
| CVE-2026-70157 | 9.8 CRITICAL | Windows System Information Console Remote Code Execution Vulnerability |
| CVE-2026-70291 | 9.8 CRITICAL | Microsoft Office Outlook Remote Code Execution Vulnerability |
| CVE-2026-96934 | 9.8 CRITICAL | Windows DHCP Server Remote Code Execution Vulnerability |
| CVE-2026-96096 | 9.8 CRITICAL | Windows Media Player Remote Code Execution Vulnerability |
| CVE-2026-96864 | 9.8 CRITICAL | Microsoft Failover Cluster Virtual Driver Remote Code Execution Vulnerability |
| CVE-2026-96924 | 9.8 CRITICAL | Windows OLE Remote Code Execution Vulnerability |
| CVE-2026-85806 | 9.8 CRITICAL | Network Policy Server (NPS) Remote Code Execution Vulnerability |
| CVE-2026-83862 | 9.8 CRITICAL | Windows Network Load Balancing Remote Code Execution Vulnerability |
| CVE-2026-100219 | 9.8 CRITICAL | Microsoft QUIC Remote Code Execution Vulnerability |
| CVE-2026-83578 | 9.8 CRITICAL | Microsoft PowerShell Remote Code Execution Vulnerability |
| CVE-2026-83935 | 9.8 CRITICAL | Microsoft XML Remote Code Execution Vulnerability |
| CVE-2026-105010 | 9.8 CRITICAL | Microsoft Windows Search Component Elevation of Privilege Vulnerability |
| CVE-2026-96909 | 9.8 CRITICAL | Windows BitLocker Remote Code Execution Vulnerability |
| CVE-2026-100222 | 9.8 CRITICAL | Network Policy Server (NPS) Remote Code Execution Vulnerability |
| CVE-2026-83748 | 9.8 CRITICAL | Windows Error Reporting Remote Code Execution Vulnerability |
| CVE-2026-70147 | 9.8 CRITICAL | Microsoft PostScript Printer Driver Remote Code Execution Vulnerability |
| CVE-2026-96219 | 9.8 CRITICAL | Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerabi |
| CVE-2026-97749 | 9.8 CRITICAL | Microsoft Office Outlook Remote Code Execution Vulnerability |
Showing top 20 of 1407 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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