EUVD-2026-73694
GHSA-rphh-prmh-5p7v
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attacker needs a low-privileged account (PR:L) and victim interaction (UI:R); XSS enables session hijacking so C:H/I:H; no availability or scope impact.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
AnalysisAI
Cross-site scripting in Microsoft SharePoint Server Subscription Edition allows an authenticated network attacker to inject malicious script into page output, enabling spoofing attacks against other users. Successful exploitation requires the victim to interact with attacker-controlled content but can result in high confidentiality and integrity impact within the victim's SharePoint session context. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold at least a low-privileged authenticated account within the target SharePoint Server Subscription Edition environment (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.3 score (AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N) accurately reflects a meaningful but conditionally exploitable vulnerability: the attacker must hold at minimum a low-privileged SharePoint account and must socially engineer a victim into interacting with attacker-controlled content. … 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 | Upgrade Microsoft SharePoint Server Subscription Edition to build 16.0.20326.20090 or later, as released by Microsoft and detailed in the MSRC update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69402. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all SharePoint Server Subscription Edition deployments and affected user populations. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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