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": "2026-08-11T18:17:30.470Z",
  "pubdate": "2026-08-11T18:17:30.470Z",
  "executiveSummary": "Adobe Lightroom Classic is impacted by a memory corruption flaw specifically classified as an out-of-bounds write vulnerability. This security defect introduces 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 compromises the affected system, allowing an adversary to execute unauthorized code with the privileges of the victim user.\nThe attack vector necessitates user interaction for successful exploitation. Specifically, a target must be induced to open a specially crafted malicious file using the vulnerable product. Without this user action, the attack cannot proceed. The risk implications are severe, as arbitrary code execution can lead to complete application compromise, data exfiltration, or further lateral movement within the host environment, depending on the operational permissions of the affected user session.",
  "technicalDetails": "The vulnerability resides in the file parsing mechanisms of Lightroom Classic, where input data from a crafted file is handled improperly during processing. The root cause is an out-of-bounds write condition, occurring when the application attempts to write data past the designated boundary of an allocated memory buffer. This typically happens due to insufficient bounds checking or integer arithmetic errors when calculating required buffer sizes for input data structures.\nExploitation of this flaw requires the generation of a malicious file designed to trigger the out-of-bounds memory write when parsed by the vulnerable component of Lightroom Classic. The step-by-step attack flow begins when the victim opens the malicious file via the application. As the software attempts to parse the structural elements of the file, the flawed parsing routine calculates incorrect memory offsets or buffer allocations. Consequently, data is written outside the intended memory region, leading to memory corruption.\nThis memory corruption can overwrite adjacent heap or stack metadata, function pointers, or critical execution variables. By carefully constructing the payload within the malicious file, an attacker can manipulate the corrupted memory state to hijack the application control flow. When the application executes the overwritten pointers, it redirects execution to attacker-supplied shellcode or payloads.\nThe vulnerability requires no authentication and no network exposure, as it is triggered locally through file processing. The privilege level required for exploitation is minimal, limited only to the standard user rights necessary to run the application and open the file. The post-exploitation impact includes the execution of arbitrary code in the context of the current user, granting the adversary the ability to read, modify, or delete data, install unauthorized software, or perform additional local privilege escalation actions if secondary vulnerabilities exist."
}