6 min read
By: RedLegg's Cyber Threat Intelligence Team
About:
CVE-2026-42822 is a critical (CVSS 10.0) elevation of privilege vulnerability affecting Azure Local Disconnected Operations (ALDO) environments due to improper authentication. While no active exploitation has been observed, attackers could gain elevated privileges over a network if exploited. Remediation requires upgrading ALDO systems to version 2604 or later via a full system update, with priority given to sensitive or externally accessible environments.
RedLegg will occasionally communicate vulnerabilities released outside the usual release schedule to provide additional value to our customers. These emergency bulletins describe vulnerabilities or threats we classify as the highest severity level and warrant out-of-band emergency patching or mitigation action.
VULNERABILITIES
Azure Local Disconnected Operations Elevation of Privilege Vulnerability
Identifier: CVE-2026-42822
PoC or Exploitation: There were no confirmed reports of active exploitation in the wild and no validated public proof-of-concept exploit code.
CVSS Score: 10.0 (Critical, CVSS v3.1)
Update / Patch: Microsoft has released remediation guidance for this vulnerability.
Affected versions include:
Azure Local Disconnected Operations (ALDO) environments requiring upgrade to version 2604 or later
Fixed versions include:
Azure Local Disconnected Operations (ALDO) version 2604 and later
Additional update details:
Updates are not available as standalone security patches. Remediation requires applying a full system update through the Azure portal.
Microsoft-operated Azure Resource Manager (ARM) environments have already received mitigation and require no customer action.
Microsoft advisory and guidance:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42822
Description:
CVE-2026-42822 is an elevation of privilege vulnerability affecting Azure Local Disconnected Operations (ALDO).
The vulnerability is caused by improper authentication within ALDO environments and may allow an unauthorized attacker to elevate privileges over a network.
Successful exploitation could permit attackers to gain elevated permissions within affected disconnected Azure Local environments, potentially impacting administrative operations, system management functions, and protected workloads.
Mitigation Recommendation:
Immediately upgrade Azure Local Disconnected Operations environments to version 2604 or later.
Prioritize remediation for externally reachable or operationally sensitive disconnected environments.
Monitor authentication logs and administrative activity for anomalous privilege escalation attempts.
Review Microsoft deployment and update documentation to ensure successful upgrade implementation.
