Quantum Secular Labs / Blog / Advisories
CVE-2026-69555: Microsoft Azure Arc: Privilege escalation
CVE-2026-69555 is rated critical with a CVSS v3.1 base score of 10.0 and affects Microsoft Azure Arc. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.
Vulnerability description
Incorrect authorization in Azure Arc allows an unauthorized attacker to elevate privileges over a network.
Severity breakdown
CVSS v3.1 10.0: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: None. No effect on availability.
Underlying weakness
CWE-863: Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Affected products
- Microsoft Azure Arc: all versions listed by NVD