CVE-2026-70297
High
Description
Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.
SeverityHigh
CVSS8.8
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 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.