CVE-2025-63680
Analyzed Analyzed - Analysis Complete
BaseFortify

Publication date: 2025-11-14

Last updated on: 2026-06-01

Assigner: MITRE

Description
Nero BackItUp in the Nero Productline is vulnerable to a path parsing/UI rendering flaw (CWE-22) that, in combination with Windows ShellExecuteW fallback extension resolution, leads to arbitrary code execution when a user clicks a crafted entry. By creating a trailing-dot folder and placing a same-basename script, Nero BackItUp renders the file as a folder icon and then invokes ShellExecuteW, which executes the script via PATHEXT fallback (.COM/.EXE/.BAT/.CMD). The issue affects recent Nero BackItUp product lines (2019-2025 and earlier) and has been acknowledged by the vendor.
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Meta Information
Published
2025-11-14
Last Modified
2026-06-01
Generated
2026-06-16
AI Q&A
2025-11-14
EPSS Evaluated
2026-06-15
NVD
CVE-2025-63680
EUVD
EUVD-2025-197651
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
nero backitup 2019
nero backitup 2022
nero backitup 2020
nero backitup 2021
nero backitup 2023
nero backitup 2025
nero backitup 2024
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
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Impact Analysis

This vulnerability can lead to arbitrary code execution on the affected system when a user clicks a crafted entry in Nero BackItUp. This means an attacker could run malicious code with the user's privileges, potentially compromising the system, stealing data, or causing other harm.

Executive Summary

This vulnerability in Nero BackItUp involves a path parsing and UI rendering flaw (CWE-22) that, combined with Windows ShellExecuteW fallback extension resolution, allows arbitrary code execution. An attacker can create a folder with a trailing dot and place a script with the same basename inside it. Nero BackItUp then displays the script as a folder icon and when the user clicks it, ShellExecuteW executes the script via fallback extensions like .COM, .EXE, .BAT, or .CMD, leading to code execution.

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