What is the CVSS score of EUVD-2026-73938?

EUVD-2026-73938 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for EUVD-2026-73938?

Yes, a patch is available for EUVD-2026-73938. Update the affected software to the latest version immediately.

Skype for Business EUVD-2026-73938

| CVE-2026-69642 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-09-08 secure@microsoft.com

GHSA-9xj5-8pjr-q9g3

XSS Microsoft

6.5

CVSS 3.1 · Vendor: microsoft

Severity by source

Vendor (microsoft) PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

vuln.today AI

6.1 MEDIUM

XSS requires victim browser rendering of injected content (UI:R); scope changes to victim browser context (S:C); no availability impact.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Metadata Corrected

Sep 08, 2026 - 23:40 vuln.today

tag: Microsoft added

Analysis Generated

Sep 08, 2026 - 23:16 vuln.today

Patch available

Sep 08, 2026 - 19:35 EUVD

DescriptionCVE.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

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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.