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": "2026-08-11T18:17:30.107Z",
  "pubdate": "2026-08-11T18:17:30.107Z",
  "executiveSummary": "Adobe Lightroom Classic is affected by an out-of-bounds write vulnerability that poses significant security risks to end users. The vulnerability arises from improper handling of specific file formats within the application, leading to a memory corruption condition. Successful exploitation of this security flaw can result in arbitrary code execution within the security context of the currently logged-in user. Consequently, an attacker could potentially compromise the confidentiality, integrity, and availability of the affected system, depending on the user's privilege level.\nThe attack vector requires user interaction to succeed. Specifically, a victim must be induced to open a specially crafted malicious file using the vulnerable application. There are no explicit requirements for prior authentication or elevated privileges beyond standard user execution rights, making social engineering a viable vector for delivery. The risk implications are severe due to the potential for complete system compromise or unauthorized execution of arbitrary instructions upon successful exploitation. Organizations and individuals utilizing Lightroom Classic should prioritize defensive measures, limit the handling of untrusted files, and apply vendor-supplied updates as soon as they become available.",
  "technicalDetails": "The vulnerability is classified as an out-of-bounds write memory corruption flaw residing within the file parsing and rendering components of Lightroom Classic. The root cause stems from insufficient bounds checking and validation logic when the application processes structured data fields within a maliciously crafted input file. When the vulnerable component attempts to write processed data into a pre-allocated memory buffer, a calculation error or missing validation allows the write operation to exceed the intended buffer boundaries.\nThe exploitation method relies on supplying a specially crafted file that manipulates internal memory structures and offsets during the parsing phase. The step-by-step attack flow proceeds as follows: First, an attacker constructs a malicious file containing manipulated header data or structural fields designed to trigger the out-of-bounds condition. Second, the attacker delivers this file to the target user via phishing, web download, or other distribution channels. Third, the victim opens the malicious file using Lightroom Classic. Fourth, as the application parses the file contents, the vulnerable component miscalculates buffer requirements or offset indices, resulting in an out-of-bounds write condition that overwrites adjacent memory regions with attacker-controlled data.\nThis memory overwrite can corrupt critical application state data, function pointers, or execution stacks, allowing the attacker to redirect control flow to malicious payload instructions. The payload behavior executes in the context of the current user, inheriting their exact privileges and access rights on the underlying operating system. The vulnerability does not require network exposure or remote listener interaction, as it is strictly driven by local file parsing. Furthermore, authentication is not required, but exploitation strictly mandates user interaction via the opening of the malicious file."
}