by Kastro
Paper/Archive/CVE-2026-66302

CVE-2026-66302

Microsoft Skype for Business Server 2015 CU13 — Skype for Business Remote Code Execution Vulnerability

EPSS 1.0%CVSS 9.8
critical.is priorityof 100
42
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 62.0.620 × 2012.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.

Affected

ProductAffectedFixed inSource
Skype for Business Server 2015 CU139319.0 – < 6.0.9319.8856.0.9319.885CNA
Skype for Business Server 2019 CU82046.0 – < 7.0.2046.5697.0.2046.569CNA
Skype for Business Server Subscription Edition CU12046.0 – < 7.0.2046.8797.0.2046.879CNA

Scores by source

microsoft (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302