CVE-2026-66304
Skype for Business Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Skype for Business Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
- Record
CVE-2026-66304- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-918
- Updated
- 2026-11-02
EUVDEUVD-2026-74043
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
- Record
EUVD-2026-74043- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wwcv-p4qq-wm65
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to...
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
- Record
GHSA-wwcv-p4qq-wm65- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
NVD
Server-side request forgery (ssrf) in Skype for Business allows an unauthorized attacker to disclose information over a network.
- Record
CVE-2026-66304- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-66304 is a high vulnerability (CVSS 7.5) in Microsoft Skype For Business Server 2015 Cu13, published September 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.97%, the 62nd percentile. No source names a fixed version.