What is the CVSS score of EUVD-2026-35507?

EUVD-2026-35507 has a CVSS 3.1 base score of 8.4 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Azure Stack Edge are affected by EUVD-2026-35507?

A stored/reflected cross-site scripting vulnerability in Microsoft Azure Stack Edge's management interface enables high-privileged authenticated users to inject malicious scripts, potentially…. A patch is available.

How to fix or mitigate EUVD-2026-35507?

Within 24 hours: Inventory all Azure Stack Edge deployments and restrict management interface access to trusted administrative networks only via firewall rules. Within 7 days: Implement network segmentation isolating Stack Edge management interfaces from general production networks; enable comprehensive audit logging and real-time alerting on all administrative sessions. Within 30 days: Establish monitoring of Microsoft Security Response Center for patch availability; evaluate Azure Stack Edge upgrade paths or replacement hardware if patches remain unavailable.

Azure Stack Edge EUVD-2026-35507

| CVE-2026-41098 HIGH

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

2026-06-09 secure@microsoft.com

GHSA-5p59-gxh8-558r

XSS Microsoft

8.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.4 HIGH

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

ENISA EUVD

HIGH

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch available

Jun 09, 2026 - 19:03 EUVD

Analysis Generated

Jun 09, 2026 - 17:35 vuln.today

CVE Published

Jun 09, 2026 - 17:17 nvd

HIGH 8.4

DescriptionCVE.org

Improper neutralization of input during web page generation ('cross-site scripting') in Azure Stack Edge allows an authorized attacker to perform spoofing over a network.

AnalysisAI

Stored or reflected cross-site scripting in Microsoft Azure Stack Edge enables an authenticated high-privileged attacker to inject malicious script into the management web interface, leading to spoofing attacks across a network with scope change to other components. With CVSS 8.4 reflecting high confidentiality, integrity, and availability impact plus required user interaction, successful exploitation could compromise adjacent Azure resources or administrative sessions. No public exploit identified at time of analysis and the vulnerability is not listed in CISA KEV.

Technical ContextAI

Azure Stack Edge is Microsoft's hybrid cloud edge appliance combining compute, storage, and networking with Azure-managed services, typically administered through a local or Azure-portal-based web UI. The flaw is rooted in CWE-79 (Improper Neutralization of Input During Web Page Generation), meaning user-controllable input rendered into the management web pages is not properly encoded or sanitized before being returned to the browser. This allows attacker-supplied HTML/JavaScript to execute in the context of the administrative web application, and the CVSS Scope:Changed indicator suggests the injected script can reach security authorities beyond the vulnerable component itself - likely the broader Azure management plane the appliance integrates with.

RemediationAI

Apply the firmware/software update referenced in Microsoft's MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41098 - Azure Stack Edge updates are delivered through the Azure portal and the appliance's local web UI, so administrators should check the device update blade and install the latest available package; exact patched version was not provided in the input data and should be taken from MSRC. Until patched, restrict access to the Azure Stack Edge local management endpoint to a dedicated jump host on an isolated management VLAN (trade-off: breaks ad-hoc admin access from end-user workstations), require all administrators to use a hardened browser profile or dedicated admin workstation when interacting with the appliance to limit cross-tenant cookie/script exposure (trade-off: operational friction), and review device administrator role assignments to minimize the population of PR:H accounts that could trigger the bug.