CVE-2026-83746
High
Description
Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Skype for Business Server 2015 CU13
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-36CWE-36
How to fix
Update
- Microsoft Skype for Business Server 2015 CU136.0.9319.886 or later
- Microsoft Skype for Business Server 2019 CU87.0.2046.583 or later
- Microsoft Skype for Business Server Subscription Edition CU17.0.2046.889 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Microsoft Skype for Business Server 2015 CU13 | 9319.0 ≤ v < 6.0.9319.886 | 6.0.9319.886 |
| Microsoft Skype for Business Server 2019 CU8 | 2046.0 ≤ v < 7.0.2046.583 | 7.0.2046.583 |
| Microsoft Skype for Business Server Subscription Edition CU1 | 2046.0 ≤ v < 7.0.2046.889 | 7.0.2046.889 |
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