CVE-2026-21031 in Samsung
Summary
by MITRE • 06/05/2026
Improper authorization in AppBlock prior to SMR Jun-2026 Release 1 allows local attacker to launch arbitrary activity. User interaction is required for triggering this vulnerability.
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Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a critical authorization flaw in AppBlock software affecting versions prior to the SMR Jun-2026 Release 1, classified under CWE-863 as improper authorization or access control weakness. The vulnerability enables local attackers to execute arbitrary activities through unauthorized system access, fundamentally undermining the security model that AppBlock is designed to enforce. The flaw specifically manifests when the system fails to properly validate user permissions or authentication contexts before allowing execution of privileged operations. Attackers can exploit this weakness by leveraging local system access to bypass intended authorization controls, potentially gaining elevated privileges or executing unauthorized code within the application environment.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it allows for arbitrary activity execution that could encompass data manipulation, system modification, or unauthorized access to protected resources. The requirement for user interaction to trigger the vulnerability suggests that attackers must first establish a foothold within the system through social engineering, phishing, or other initial compromise techniques before exploiting the authorization flaw. This requirement reduces the attack surface but does not eliminate the severity of the vulnerability, particularly in environments where local access is readily available or where users may be susceptible to manipulation. The vulnerability affects the core security architecture of AppBlock by creating an unauthorized execution path that circumvents established authorization protocols.
From a cybersecurity perspective, this vulnerability aligns with ATT&CK technique T1068 which involves the use of legitimate credentials to gain access to systems and resources, and T1078 which covers valid accounts and legitimate credentials as entry points for unauthorized access. The attack chain typically involves initial compromise followed by exploitation of the authorization flaw to execute malicious activities without proper system permissions. Organizations should implement immediate mitigations including updating to the SMR Jun-2026 Release 1 which contains the necessary authorization fixes, implementing additional local access controls, and monitoring for unauthorized activity patterns that might indicate exploitation attempts. Security teams should also review existing access control policies and consider implementing principle of least privilege configurations to limit potential impact if exploitation occurs. The vulnerability demonstrates the critical importance of proper authorization validation in security software and highlights the necessity of regular security updates and patches to maintain system integrity against known exploitation vectors.