CVE-2026-66304— Skype for Business Information Disclosure 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 存在服务端请求伪造（SSRF）漏洞，允许未授权的攻击者通过网络泄露信息。
Possible ATT&CK Techniques 3 AI
T1041 · Exfiltration Over C2 Channel T1135 · Network Share Discovery T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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-2026-66304
Vulnerability Information
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Vulnerability Title
Skype for Business Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Microsoft | Skype for Business Server 2015 CU13 | 9319.0 ~ 6.0.9319.885 | - |
|
| 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-2026-66304
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-66304 (1)
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Showing top 20 of 966 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Skype for Business Server 2015 CU13
-
CVE-2026-66303
Skype for Business and Lync Denial of Service Vulnerability -
CVE-2026-66307
Skype for Business and Lync Denial of Service Vulnerability -
CVE-2026-69646
Skype for Business Spoofing Vulnerability -
CVE-2026-69642
Skype for Business Spoofing Vulnerability -
CVE-2026-66305
Skype for Business Spoofing Vulnerability
Same vendor: Microsoft
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CVE-2026-66303
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CVE-2026-66305
Skype for Business Spoofing Vulnerability
Same weakness: CWE-918
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V. Comments for CVE-2026-66304
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