EUVD-2026-73938
GHSA-9xj5-8pjr-q9g3
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
XSS requires victim browser rendering of injected content (UI:R); scope changes to victim browser context (S:C); no availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.
AnalysisAI
Cross-site scripting in on-premises Skype for Business Server enables network-accessible spoofing attacks across three supported server generations. The CVSS 6.5 rating reflects limited confidentiality and integrity impact, consistent with content-injection or UI-spoofing outcomes rather than full session takeover. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The vulnerability affects on-premises Skype for Business Server deployments only; organizations fully migrated to Microsoft Teams cloud services are not affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 score (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) represents moderate severity with notable caveats. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released cumulative updates to reach patched build levels: Skype for Business Server Subscription Edition to 7.0.2046.879 or later, Skype for Business Server 2019 to 7.0.2046.569 or later, and Skype for Business Server 2015 to 6.0.9319.885 or later, as specified in EUVD-2026-73938. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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