CVE-2026-85873
Skype for Business Elevation of Privilege Vulnerability
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- 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 Elevation of Privilege Vulnerability
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-85873- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Weakness
- CWE-639
- Updated
- 2026-11-02
EUVDEUVD-2026-100142
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
- Record
EUVD-2026-100142- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6286-h9rv-4j7m
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to...
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
- Record
GHSA-6286-h9rv-4j7m- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
Improper authorization in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
- Record
CVE-2026-85873- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-639
- 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-2026-85873 is a medium vulnerability (CVSS 6.5) in Microsoft Skype For Business Server 2015 Cu13, published October 13, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.96%, the 61st percentile. No source names a fixed version.