Description

Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T18:17:30.320Z",
  "pubdate": "2026-08-11T18:17:30.320Z",
  "executiveSummary": "Adobe Lightroom Classic is impacted by a memory corruption flaw specifically categorized as an out-of-bounds write vulnerability. This security deficiency poses significant risk to system integrity and user confidentiality by potentially facilitating arbitrary code execution within the security context of the currently logged-in user. Successful exploitation of this vulnerability requires direct user interaction, specifically mandating that the targeted victim opens a specially crafted malicious file using the vulnerable software. The realization of this exploit could lead to unauthorized code execution, allowing an attacker to execute arbitrary commands, manipulate application data, or leverage the user's privileges to compromise the underlying system further. Given the requirement for user participation, the primary vector relies on social engineering or malicious file distribution, making user awareness and timely software updates critical components of the risk mitigation strategy. There are no indications of network exposure or authentication bypasses required; rather, the flaw stems from improper handling of file parsing operations within the application's processing pipeline.",
  "technicalDetails": "The vulnerability under analysis is an out-of-bounds write flaw residing within Adobe Lightroom Classic. An out-of-bounds write occurs when software writes data past the intended boundary of a designated buffer, often corrupting adjacent memory regions, control data, or critical application structures. In this specific scenario, the root cause is tied to inadequate bounds checking during the parsing and processing of untrusted file formats handled by the application. When a user is induced to open a malicious file, the application attempts to parse the structural components of the input without properly validating size constraints or index offsets against allocated memory buffers. As a result, specially crafted data within the malicious file forces the application to write internal parsing states or extracted payloads outside the allocated boundaries of the target buffer. The exploitation method relies entirely on local file processing where the malicious file acts as the primary attack vector. From an execution standpoint, the attack flow initiates when the victim opens the malicious file via Lightroom Classic. The vulnerable component processes the malformed input, triggering the memory corruption condition. If the out-of-bounds write successfully overwrites adjacent critical execution pointers or function structures, the attacker can hijack the control flow of the application. Consequently, this enables the execution of arbitrary shellcode or payloads matching the architecture of the host system. The exploitation requires no authentication and can be performed by standard users, as it operates within the privilege context of the current user running the application. The post-exploitation impact includes full code execution under the user's privileges, potentially leading to local data theft, installation of persistent malware, or lateral movement depending on the user's access rights on the host operating system."
}