CVE-2026-62835 Overview
CVE-2026-62835 is an improper authorization vulnerability in Microsoft Azure Portal. The flaw allows an unauthenticated attacker to disclose sensitive information over a network. The vulnerability is classified under [CWE-285] Improper Authorization and carries a CVSS 3.1 base score of 7.5.
The issue affects the confidentiality of Azure Portal data without requiring privileges or user interaction. Microsoft published the advisory through the Security Response Center on July 24, 2026.
Critical Impact
An unauthorized network-based attacker can retrieve confidential information from Azure Portal without authentication or user interaction.
Affected Products
- Microsoft Azure Portal (cpe:2.3:a:microsoft:azure_portal:-)
- Cloud tenants accessing resources via the affected portal service
- Azure management interfaces exposed to the network attack surface
Discovery Timeline
- 2026-07-24 - CVE-2026-62835 published to NVD
- 2026-07-29 - Last updated in NVD database
Technical Details for CVE-2026-62835
Vulnerability Analysis
The vulnerability stems from improper authorization checks in the Microsoft Azure Portal service. Azure Portal fails to correctly enforce access controls on specific requests, permitting unauthorized callers to retrieve information that should be restricted.
An attacker can reach the vulnerable functionality over the network without prior authentication. The flaw does not require user interaction and executes within a single security scope. Successful exploitation results in disclosure of confidential data but does not affect integrity or availability.
Azure Portal is the web-based management console used by administrators to configure and monitor Azure resources. Improper authorization in this interface expands the attack surface for reconnaissance against cloud tenants and their workloads.
Root Cause
The root cause is classified as [CWE-285] Improper Authorization. The application performs an authorization check that is either missing, incomplete, or incorrectly evaluated for a resource or action. As a result, requests that should be denied are processed, and the underlying data is returned to the caller.
Attack Vector
The attack vector is network-based with low complexity. No credentials or user interaction are required. An attacker sends crafted requests to the Azure Portal endpoint and receives responses containing information that authorization policy should have blocked. Refer to the Microsoft Security Update CVE-2026-62835 advisory for vendor-specific technical details.
No public proof-of-concept exploit is available at the time of publication, and the vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is 0.973%.
Detection Methods for CVE-2026-62835
Indicators of Compromise
- Anomalous unauthenticated or low-privileged requests to Azure Portal endpoints that return resource metadata
- Bursts of enumeration-style requests originating from unfamiliar network ranges or Tor exit nodes
- Azure activity log entries showing information retrieval without corresponding authenticated sign-in events
Detection Strategies
- Enable and review Azure Portal and Azure Resource Manager sign-in and audit logs for unauthorized access patterns
- Correlate portal request telemetry with identity provider logs to identify requests lacking valid authentication context
- Baseline normal administrative activity and alert on deviations in request volume, geolocation, or user-agent strings
Monitoring Recommendations
- Stream Azure diagnostic logs to a centralized SIEM for continuous inspection and retention
- Configure Microsoft Defender for Cloud alerts on suspicious portal and management-plane activity
- Monitor Microsoft Security Response Center advisories for updates to CVE-2026-62835
How to Mitigate CVE-2026-62835
Immediate Actions Required
- Review the Microsoft Security Update CVE-2026-62835 advisory and apply the vendor's guidance
- Audit Azure role assignments and remove excessive permissions from users and service principals
- Enforce Conditional Access policies and multi-factor authentication for all Azure Portal access
Patch Information
Azure Portal is a Microsoft-managed cloud service. Microsoft applies mitigations directly at the service level, so no customer-side patch installation is required. Administrators should confirm remediation status through the Microsoft Security Update CVE-2026-62835 advisory.
Workarounds
- Restrict Azure Portal access to trusted IP ranges using Conditional Access location conditions
- Apply the principle of least privilege across Azure RBAC role assignments to limit information exposure
- Enable Privileged Identity Management (PIM) to require just-in-time elevation for administrative roles
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
