CVE-2026-42834: CWE-59: Improper Link Resolution Before File Access ('Link Following') in Microsoft Windows Admin Center in Azure Portal
Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42834) in Microsoft Windows Admin Center within the Azure Portal arises from improper access control related to link resolution before file access (CWE-59). It allows an attacker with some level of authorization to elevate their privileges over a network. The CVSS v3.1 score is 7.8 (high severity), reflecting the potential for significant confidentiality, integrity, and availability impact. The affected version explicitly stated is version 1.0. Microsoft has issued an official fix and manages remediation for this cloud-hosted service. No public exploits are currently known.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges over the network, potentially gaining higher access rights than intended. This could lead to compromise of confidentiality, integrity, and availability of the affected system or service.
Mitigation Recommendations
An official fix is available from Microsoft. As this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42834 for detailed guidance and ensure their Windows Admin Center in Azure Portal is updated accordingly.
CVE-2026-42834: CWE-59: Improper Link Resolution Before File Access ('Link Following') in Microsoft Windows Admin Center in Azure Portal
Description
Improper access control in Windows Admin Center allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42834) in Microsoft Windows Admin Center within the Azure Portal arises from improper access control related to link resolution before file access (CWE-59). It allows an attacker with some level of authorization to elevate their privileges over a network. The CVSS v3.1 score is 7.8 (high severity), reflecting the potential for significant confidentiality, integrity, and availability impact. The affected version explicitly stated is version 1.0. Microsoft has issued an official fix and manages remediation for this cloud-hosted service. No public exploits are currently known.
Potential Impact
An authorized attacker can exploit this vulnerability to elevate privileges over the network, potentially gaining higher access rights than intended. This could lead to compromise of confidentiality, integrity, and availability of the affected system or service.
Mitigation Recommendations
An official fix is available from Microsoft. As this is a cloud-hosted service, Microsoft manages the remediation server-side. Users should refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42834 for detailed guidance and ensure their Windows Admin Center in Azure Portal is updated accordingly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T14:51:12.703Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42834","vendor":"Microsoft"}]
Threat ID: 6a0db4dcba1db473627ecd78
Added to database: 05/20/2026, 13:19:24 UTC
Last enriched: 06/19/2026, 17:42:49 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 93
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