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.
History

Sat, 15 Nov 2025 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
Nero
Nero backitup
Vendors & Products Microsoft
Microsoft windows
Nero
Nero backitup

Fri, 14 Nov 2025 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 14 Nov 2025 18:45:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-14T19:21:27.874Z

Reserved: 2025-10-27T00:00:00.000Z

Link: CVE-2025-63680

cve-icon Vulnrichment

Updated: 2025-11-14T19:20:40.686Z

cve-icon NVD

Status : Received

Published: 2025-11-14T19:16:01.360

Modified: 2025-11-14T20:15:47.523

Link: CVE-2025-63680

cve-icon Redhat

No data.