CVE-2026-58704 in Android
Summary
by MITRE • 09/15/2026
In Cellular Modem, there is a possible permission bypass due to a logic error in the code. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 09/15/2026
The identified vulnerability resides within the cellular modem subsystem and represents a critical security flaw characterized by a permission bypass resulting from a logic error in the underlying codebase. This type of defect typically arises when the software fails to correctly enforce access control policies during specific operational sequences, allowing an actor with limited privileges to execute actions or access resources reserved for higher-privileged entities. In this context, the vulnerability enables remote escalation of privilege, specifically through proximal or adjacent network connections. This means that an attacker does not need direct physical access or local shell access but can exploit the flaw over a wireless interface such as Bluetooth, Wi-Fi Direct, or cellular signaling channels to gain elevated system rights. The absence of required additional execution privileges significantly lowers the barrier for exploitation, making this vulnerability particularly dangerous in environments where devices are frequently connected to untrusted networks or peripherals.
From an operational impact perspective, successful exploitation allows an adversary to bypass security boundaries that are designed to isolate sensitive modem functions from the main application processor. Cellular modems often handle critical communications and may have access to network configuration data, location information, or even control over radio frequency parameters. By escalating privileges within this subsystem, a malicious actor could potentially intercept communications, manipulate network settings, disable security features, or use the device as a pivot point for further attacks against other devices on the same local network. Since user interaction is not required, the vulnerability can be exploited automatically and silently in the background, often without any indication to the end-user that their system integrity has been compromised. This stealth aspect exacerbates the risk, as detection becomes difficult until significant damage or data exfiltration has occurred.
The technical nature of this logic error suggests a failure in state management or input validation within the modem firmware or its interface drivers. Such errors often occur when conditional checks are bypassed due to race conditions, improper handling of edge cases, or flawed assumptions about the trustworthiness of incoming requests from adjacent devices. The vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-269: Improper Privilege Management and CWE-841: Improper Enforcement of Behavioral Workflow. These classifications highlight that the core issue is not necessarily a buffer overflow or memory corruption, but rather a fundamental flaw in how permissions are assigned and verified during runtime operations. The ability to escalate privileges without additional execution rights indicates that the vulnerability likely exploits an inherent trust relationship between components within the device architecture, which should be strictly enforced through independent verification mechanisms.
In terms of threat modeling, this vulnerability maps closely to techniques observed in the MITRE ATT&CK framework, particularly those related to privilege escalation and lateral movement via adjacent devices. Attackers may leverage tools or custom scripts that communicate with the cellular modem interface over local wireless protocols to trigger the logic error repeatedly until successful elevation is achieved. The proximity-based nature of the attack vector means that physical presence near the target device is sufficient for exploitation, which poses significant risks in public spaces, corporate environments, or IoT deployments where devices are often left unattended and connected. Defenders must recognize that adjacent network vulnerabilities can serve as entry points for broader system compromise, effectively bypassing perimeter defenses designed to stop remote internet-based attacks.
Mitigation strategies should focus on both immediate remediation and long-term architectural improvements. The primary solution involves applying vendor-provided firmware updates or patches that correct the logic error responsible for the permission bypass. These updates typically involve hardening the access control lists within the modem subsystem, ensuring that all privilege checks are performed consistently regardless of the source of the request. Additionally, implementing strict input validation and sanitization routines can prevent malformed or unexpected commands from triggering the flawed code paths. From a defensive posture perspective, organizations should restrict unnecessary wireless interfaces when not in use to reduce the attack surface available for adjacent network exploitation. Network segmentation policies that isolate cellular modem components from general-purpose application processors can also limit the blast radius of such vulnerabilities. Regular security audits and static analysis of firmware code are recommended to identify similar logic errors before they reach production environments, ensuring robust enforcement of least-privilege principles across all system layers.