CVE-2026-21064 in Samsung
Summary
by MITRE • 08/10/2026
Improper access control in Weaver prior to SMR Aug-2026 Release 1 allows local attackers to cause device inoperability.
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Analysis
by VulDB Data Team • 08/10/2026
This vulnerability represents a critical access control flaw in the Weaver framework that affects versions prior to the SMR August 2026 release. The issue stems from inadequate authorization mechanisms that permit local attackers to execute malicious actions capable of rendering devices inoperative. Such improper access control vulnerabilities typically fall under CWE-284 which specifically addresses "Improper Access Control" where systems fail to properly enforce access restrictions, allowing unauthorized users or processes to perform operations they should not be permitted to execute.
The technical implementation flaw likely involves insufficient validation of user privileges or process permissions within the Weaver framework's security model. Local attackers can exploit this weakness by leveraging their existing system access to manipulate critical device functions or configuration parameters. The vulnerability's impact manifests as device inoperability, which could involve complete system shutdowns, service disruptions, or corruption of essential operational components that prevent normal device functionality.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Weaver-based systems, particularly in environments where local access is not strictly controlled. Attackers with physical or network access to target devices can exploit this flaw to cause cascading failures across deployed systems, potentially affecting business continuity and operational availability. The local nature of the attack vector suggests that the vulnerability may be exploitable through standard user accounts without requiring elevated privileges or specialized tools.
The attack surface for this vulnerability aligns with ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and T1490 which addresses "Inhibit System Recovery." The impact extends beyond simple denial of service to potentially compromise the integrity of system operations, as attackers could manipulate device states in ways that prevent normal recovery procedures from functioning. Organizations should consider implementing strict access controls, regular security updates, and monitoring for unauthorized local access attempts to mitigate this risk.
Recommended mitigations include immediate deployment of the SMR August 2026 release or equivalent patches that address the access control implementation flaws. System administrators should also implement principle of least privilege configurations, monitor for anomalous local system activities, and conduct regular security assessments of Weaver-based environments to identify potential exploitation vectors. Additionally, organizations should establish robust incident response procedures specifically tailored to address device inoperability scenarios resulting from such access control vulnerabilities.