CVE-2020-1098 in Windows
Summary
by MITRE
<p>An elevation of privilege vulnerability exists when the Shell infrastructure component improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context.</p> <p>To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.</p> <p>The update addresses the vulnerability by correcting the way in which the Shell infrastructure component handles objects in memory and preventing unintended elevation from lower integrity application.</p>
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Analysis
by VulDB Data Team • 02/24/2026
The vulnerability identified as CVE-2020-1098 represents a critical elevation of privilege flaw within the Windows Shell infrastructure component, specifically manifesting in improper memory object handling practices that create opportunities for unauthorized privilege escalation. This vulnerability falls under the CWE-264 weakness category, which encompasses permissions, privileges, and access control issues, and aligns with ATT&CK technique T1068, which focuses on exploit for privilege escalation. The flaw exists in how the Windows Shell component processes memory objects, creating a pathway for malicious code execution in elevated contexts that should normally be restricted to authorized processes.
The exploitation scenario for CVE-2020-1098 requires an initial foothold through user authentication, as attackers must first establish a valid login session on the target system before attempting to leverage the vulnerability. This prerequisite aligns with the principle of least privilege and demonstrates that the vulnerability cannot be exploited remotely without prior access. Once authenticated, an attacker can execute a specially crafted application that exploits the memory handling flaw to elevate their privileges from standard user context to elevated privileges, effectively bypassing the system's integrity controls. The attack vector specifically targets the Shell infrastructure which is integral to Windows user interface operations, making it a high-value target for exploitation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as successful exploitation allows attackers to execute arbitrary code with elevated privileges, potentially enabling complete system compromise. The vulnerability's nature means that legitimate applications running in lower integrity contexts could be manipulated to gain higher privileges, undermining the fundamental security model of Windows integrity levels. This creates a persistent threat vector where attackers can maintain elevated access and potentially establish persistence mechanisms within the compromised system. The vulnerability's impact is particularly concerning in enterprise environments where users may have legitimate access to systems but should not be able to escalate privileges through software flaws.
Microsoft's remediation for CVE-2020-1098 focuses on correcting the memory object handling within the Shell infrastructure component, specifically addressing how the system manages objects in memory and preventing unintended privilege elevation from lower integrity applications. This fix implements proper memory management controls that ensure objects are handled according to established security boundaries, preventing the escalation path that attackers could exploit. The update addresses the root cause by strengthening the integrity checks that occur during Shell component operations, ensuring that applications cannot inadvertently elevate their privileges through memory manipulation techniques. Organizations should prioritize applying this security update to maintain system integrity and prevent exploitation attempts that could lead to complete system compromise.