CVE-2026-35083 in Single-A
Summary
by MITRE • 06/03/2026
A remote attacker with user privileges can exploit a stack buffer overflow to gain full system access as root.
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Analysis
by VulDB Data Team • 06/03/2026
This vulnerability represents a critical stack buffer overflow flaw that allows a remote attacker with only standard user privileges to escalate their access to root level system control. The flaw occurs when the application fails to properly validate input size before copying data onto a fixed-size stack buffer, creating an exploitable condition where malicious input can overwrite adjacent memory locations including return addresses and control registers. The vulnerability is classified under cwe-121 as a classic stack-based buffer overflow, which directly violates secure coding principles and provides an attack surface that can be leveraged for privilege escalation. The attack vector is particularly dangerous because it requires no elevated privileges to initiate, making it accessible to any remote user who can interact with the vulnerable service. When exploited successfully, this vulnerability enables attackers to execute arbitrary code with the highest system privileges, effectively compromising the entire system. The operational impact extends beyond simple privilege escalation as it can provide attackers with persistent access, data exfiltration capabilities, and the ability to establish backdoors or further compromise network infrastructure. The vulnerability can be exploited through various methods including crafted input to network services, file uploads, or any interface that accepts user-supplied data without proper bounds checking. According to the attack technique framework, this represents a privilege escalation attack pattern that aligns with att&ck technique t1068 which covers exploit for privilege escalation and t1548.1 which covers abuse of system permissions. The flaw demonstrates poor input validation practices and inadequate memory management controls, creating a condition where the application's stack memory layout becomes exploitable by attackers. This vulnerability type is particularly concerning in network services and applications that process external input, as it can be exploited remotely without requiring physical access or prior authentication. The exploitation process typically involves crafting specific input that overflows the buffer and redirects program execution flow to malicious code, often through return-oriented programming or direct code injection techniques. Organizations should prioritize immediate patching of affected systems, implement input validation controls, and conduct thorough security assessments to identify similar vulnerabilities in their codebase. Network segmentation and access controls can provide additional defense-in-depth measures, while monitoring for unusual network traffic patterns may help detect exploitation attempts. The vulnerability underscores the importance of following secure coding guidelines and conducting regular code reviews to prevent such critical flaws from being introduced into production systems.