CVE-2025-58716 in Windows
Summary
by MITRE • 10/14/2025
Improper input validation in Microsoft Windows Speech allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/31/2025
This vulnerability resides within Microsoft Windows Speech components where insufficient input validation permits malicious manipulation of speech processing functions. The flaw exists in how the system validates user-supplied data during speech recognition and processing operations, creating a pathway for privilege escalation attacks. An authorized user with low-privilege access can exploit this weakness to gain elevated system privileges through carefully crafted speech inputs that bypass normal validation checks. The vulnerability specifically impacts the speech recognition engine's handling of malformed or unexpected input parameters, potentially allowing attackers to execute arbitrary code with higher privileges than initially granted.
The technical implementation of this vulnerability stems from inadequate sanitization of speech data within the Windows Speech API framework. When speech recognition services process user input, they fail to properly validate the structure and content of voice commands, particularly those involving command sequences or speech patterns that could trigger buffer overflows or memory corruption. This weakness enables attackers to craft speech inputs that manipulate the speech engine's internal state, potentially leading to code execution in the context of the elevated privileges. The flaw aligns with common software security issues categorized under CWE-20, which addresses improper input validation, and CWE-119, dealing with improper access to memory locations.
From an operational perspective, this vulnerability presents a significant risk to Windows environments where speech recognition features are enabled, particularly in enterprise settings where users may have legitimate access to speech-enabled applications. Attackers can leverage this weakness by first establishing a foothold through normal user accounts and then using the speech recognition system to execute privilege escalation attacks. The local nature of the vulnerability means that physical or network access to a target system is required, but once exploited, the attacker can gain system-level privileges without requiring additional authentication. This type of attack aligns with techniques described in the MITRE ATT&CK framework under T1068, which covers 'Exploitation for Privilege Escalation,' and T1555, covering 'Credentials from Password Stores."
Mitigation strategies should focus on both immediate patching and operational security measures. Microsoft has released security updates addressing this vulnerability through regular Windows updates, which should be deployed immediately across all affected systems. Organizations should also consider implementing additional access controls and monitoring for unusual speech recognition activity that might indicate exploitation attempts. Network segmentation and privilege minimization practices can help reduce the potential impact if exploitation occurs. Security teams should monitor for abnormal system behavior related to speech processing services and implement logging controls that capture speech recognition events for forensic analysis. Additionally, organizations should review their speech recognition deployment policies to ensure that unnecessary speech features are disabled in environments where they pose unnecessary risk. The vulnerability demonstrates the importance of validating all input sources, including those that might seem innocuous like speech commands, and highlights the need for comprehensive security testing of all system components that process user-generated input.