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High 8.8Published Oct 13, 2026
CVE-2026-70297Skype for Business Remote Code Execution Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Skype for Business Server 2015 CU13 and 2 other products. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 1.02%, higher than 63% of scored CVEs.
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Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to execute code over a network.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-36
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 1.02% (percentile 63)
- Assigned by
- microsoft
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
Microsoft Skype for Business Server 2015 CU13 microsoft:skype_for_business_server_2015_cu13 (from the name) | 9319.0 builds before 6.0.9319.886 | CNA record |
Microsoft Skype for Business Server 2019 CU8 microsoft:skype_for_business_server_2019_cu8 (from the name) | 2046.0 builds before 7.0.2046.583 | CNA record |
Microsoft Skype for Business Server Subscription Edition CU1 microsoft:skype_for_business_server_subscription_edition_cu1 (from the name) | 2046.0 builds before 7.0.2046.889 | CNA record |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70297vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.