CVE-2025-58773 in AptioV
Summary
by MITRE • 10/13/2026
AMI APTIOV contains vulnerabilities in BIOS where users may cause "Out-of-bounds Write” by local access. Successful exploitation of this vulnerability could lead to buffer overflows, memory corruption, and arbitrary code execution, and also impact Confidentiality, Integrity, and Availability.
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Analysis
by VulDB Data Team • 10/13/2026
The Advanced Micro Devices AMI APTIOV BIOS firmware contains critical security flaws that stem from improper validation of input data during system initialization or runtime operations. These vulnerabilities are primarily characterized as out-of-bounds write errors, which occur when the software writes data to a memory location beyond the intended buffer boundaries. This type of flaw is typically rooted in insufficient boundary checks within low-level code segments responsible for hardware abstraction layer interactions or configuration management tasks. Because these functions operate at ring 0 with unrestricted access to system resources and physical memory, any miscalculation regarding array indices or pointer arithmetic can result in writing data into adjacent memory regions that may contain executable code, critical system structures, or other sensitive variables.
The operational impact of exploiting an out-of-bounds write vulnerability in the BIOS environment is severe due to the elevated privileges inherent to firmware execution environments. An attacker with local access who successfully triggers this condition can corrupt memory contents, leading to unpredictable system behavior such as crashes, freezes, or unintended reboots that directly compromise availability. More critically, if the overwritten memory region includes function pointers or return addresses on the stack, an attacker may achieve arbitrary code execution by redirecting program flow to malicious payloads injected into memory. This capability effectively allows for full control over the underlying hardware and operating system, bypassing traditional OS-level security controls since firmware executes before most security agents are initialized.
From a classification perspective, this vulnerability aligns with CWE-787: Out-of-bounds Write, which describes writing to a memory location that is outside of the intended buffer. The potential for arbitrary code execution further associates it with CWE-94: Improper Control of Generation of Code (Code Injection). In terms of adversary tactics and techniques as defined by MITRE ATT&CK, successful exploitation would likely fall under T1055: Process Injection or more specifically firmware-level persistence mechanisms such as those described in the BIOS/UEFI attack surface. Attackers leveraging this flaw could establish persistent access that survives operating system reinstalls and standard security patches, making detection and remediation significantly challenging without specialized hardware debugging tools or firmware integrity verification processes.
Mitigation strategies for AMI APTIOV vulnerabilities require a multi-layered approach focusing on both immediate patching and long-term architectural improvements. The primary defense is the timely application of vendor-provided BIOS updates that address these specific memory safety issues through corrected input validation logic. Organizations should also enforce strict physical access controls to prevent unauthorized local users from attempting exploitation, as this vulnerability requires local system access to trigger. Additionally implementing Secure Boot with measured boot processes can help detect modifications to firmware components and ensure only signed, trusted code executes during the pre-boot phase. Regular auditing of BIOS settings and disabling unnecessary legacy interfaces such as Legacy USB Support or onboard serial ports can reduce the attack surface available for exploitation attempts.