CVE-2026-7162 in WinFsp
Summary
by MITRE • 07/13/2026
Successful exploitation of the integer overflow vulnerability could allow an attacker to achieve system-level access to the affected software.
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Analysis
by VulDB Data Team • 07/13/2026
Integer overflow vulnerabilities represent a critical class of software flaws that occur when a program attempts to store a value that exceeds the maximum capacity of the data type being used. This condition typically arises during arithmetic operations or memory allocation processes where developers fail to properly validate input values against the boundaries of their designated variables. The vulnerability manifests when an application performs calculations using integer data types without adequate overflow checking mechanisms, creating opportunities for malicious actors to manipulate program flow through carefully crafted inputs.
The technical exploitation of integer overflow conditions often involves feeding malicious data that causes arithmetic operations to wrap around to unexpected values within the integer domain. When an attacker successfully triggers such an overflow, they can potentially manipulate memory layout, bypass access controls, or redirect execution paths within the targeted application. This type of vulnerability commonly affects buffer management operations where array indices, loop counters, or memory allocation sizes are calculated using potentially untrusted input data. The flaw creates a pathway for privilege escalation attacks that can ultimately lead to complete system compromise when the overflow results in memory corruption or control flow redirection.
From an operational perspective, integer overflow vulnerabilities pose significant risks to software integrity and system security as they can be leveraged across multiple attack vectors including remote code execution, denial of service conditions, and unauthorized access to sensitive data. The impact extends beyond immediate exploitation capabilities to encompass broader security implications such as data leakage, system instability, and potential lateral movement within network environments. Security professionals must recognize that these vulnerabilities often remain undetected for extended periods due to their subtle nature and the difficulty in reproducing specific overflow conditions during testing phases.
Effective mitigation strategies for integer overflow vulnerabilities require comprehensive code review processes that incorporate automated static analysis tools alongside manual verification techniques. Organizations should implement robust input validation mechanisms, utilize safe arithmetic libraries, and employ compiler-based protections such as stack canaries and address space layout randomization to reduce exploitation success rates. The vulnerability aligns with CWE-190 which specifically addresses integer overflow conditions, and relates to ATT&CK technique T1203 which covers exploitation for privilege escalation through software vulnerabilities. Regular security assessments, including penetration testing and fuzzing operations, help identify potential overflow scenarios before they can be exploited by malicious actors in real-world environments.