Description

Use of uninitialized resource in Windows Imaging Component allows an authorized attacker to disclose information locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.5",
  "pubDate": "2026-08-11T17:18:25.830Z",
  "pubdate": "2026-08-11T17:18:25.830Z",
  "executiveSummary": "An information disclosure vulnerability exists in the Windows Imaging Component due to the use of an uninitialized resource. This security flaw enables an authorized local attacker to access sensitive information residing in memory, potentially compromising system confidentiality.\nThe affected product is the Windows Imaging Component across supported platforms. The vulnerability manifests locally, requiring the attacker to possess prior authorization to execute code on the target machine. Successful exploitation does not require elevated privileges beyond the initial local access, but it does necessitate the execution of a specially crafted payload or application designed to interact with the vulnerable component.\nThe risk implications center on unauthorized data exposure, where sensitive memory contents—potentially including credentials, cryptographic keys, or application data—are divulged to the attacker. Because the vulnerability involves uninitialized resources, the exact data exposed depends on prior memory allocations, increasing the unpredictability and stealth of the information gathering process. Remediation requires applying official vendor patches as they become available and adhering to strict local access control principles to limit unauthorized code execution.",
  "technicalDetails": "The vulnerability resides within the Windows Imaging Component, specifically handling image parsing and memory resource allocation. The root cause is the failure of the component to properly initialize a resource before it is read or processed during image rendering or metadata extraction operations.\nWhen an application processes a maliciously crafted image file or interacts directly with the vulnerable subsystem via exposed application programming interfaces, the Windows Imaging Component attempts to read from a memory buffer or resource that contains residual data from previous system operations rather than cleared, predictable states.\nThe attack flow proceeds as follows: First, the authorized local attacker authenticates to the target system with standard user privileges. Second, the attacker deploys or executes a localized payload designed to invoke the Windows Imaging Component functions using specific parameters or by supplying a malformed image file. Third, the component initializes its internal data structures but fails to clear or assign valid initial values to the specific resource in question. Fourth, subsequent read operations access this uninitialized memory region. Finally, the component returns the contents of the uninitialized resource—containing arbitrary kernel or user-space memory fragments—back to the calling process, allowing the attacker to harvest sensitive information.\nThe exploitation method relies strictly on local access, requiring no network exposure as the attack surface is entirely contained within local inter-process communication and file processing APIs. Authentication is required only in the sense that the attacker must have interactive or programmatic execution rights on the local operating system. The privilege requirements are low, as standard users typically have permissions to invoke the Windows Imaging Component for standard image rendering tasks. Post-exploitation impact is strictly limited to local information disclosure; however, the harvested memory contents can often be leveraged in secondary attacks to achieve privilege escalation or lateral movement."
}