CVE-2026-97798 in Windows
Summary
by MITRE • 10/14/2026
Improper neutralization of argument delimiters in a command ('argument injection') in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability described constitutes a critical security flaw within the Windows Error Reporting service, specifically involving improper neutralization of special elements used in a command known as argument injection. This type of weakness is formally categorized under Common Weakness Enumeration identifier CWE-88, which addresses errors related to how software handles arguments passed to external processes. In this specific context, the vulnerability allows an attacker who has already gained authorized access to the system to manipulate the input parameters processed by Windows Error Reporting. Because the service operates with elevated privileges and is deeply integrated into the operating system's diagnostic infrastructure, any manipulation of its command-line arguments can have far-reaching consequences beyond a simple application crash or error report generation.
The technical mechanism behind this flaw relies on the failure to properly sanitize or escape special characters within user-supplied data before it is incorporated into commands executed by the Windows Error Reporting service. When an authorized attacker interacts with components that trigger error reporting, they can inject malicious command-line arguments designed to alter the behavior of subsequent processes launched by the system. This injection does not require bypassing authentication mechanisms since the prerequisite for exploitation is already met through legitimate user access. The flaw essentially allows the attacker to trick the privileged service into executing unintended commands or passing modified parameters to other trusted applications, thereby leveraging the trust relationship between the error reporting subsystem and higher-privilege components of the operating system.
From an operational impact perspective, this vulnerability facilitates local privilege escalation, a scenario where a user with standard permissions gains administrative rights without explicit authorization. This aligns directly with MITRE ATT&CK technique T1068, which covers exploitation for privilege escalation. By exploiting argument injection within Windows Error Reporting, an attacker can potentially execute arbitrary code in the context of a highly privileged process or manipulate system configurations to maintain persistence and expand their control over the compromised environment. The ability to escalate privileges locally is particularly dangerous because it often serves as a stepping stone for further attacks, including lateral movement across networked systems or exfiltration of sensitive data that would otherwise be protected by access controls designed to restrict such actions to administrators only.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is the timely application of security patches provided by Microsoft that address this specific argument injection flaw within Windows Error Reporting. Organizations should prioritize updating all affected systems, particularly those where users have standard privileges but require access to diagnostic tools or applications prone to triggering error reports. Additionally, implementing strict input validation and output encoding practices in any custom software interacting with system services can prevent similar vulnerabilities from being introduced through third-party integrations. Security teams should also monitor for anomalous process creation events that involve Windows Error Reporting launching unexpected commands, as this may indicate active exploitation attempts. Enforcing least-privilege principles ensures that even if an attacker gains initial access, their ability to interact with high-impact system services is restricted, thereby reducing the attack surface available for privilege escalation via argument injection vectors.