CVE-2025-63680 Path traversal in n/a
Attackers can achieve arbitrary code execution by tricking users into clicking crafted entries in Nero BackItUp due to path parsing flaws and Windows ShellExecuteW behavior.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-63680?
CVE-2025-63680 is a high-severity path traversal vulnerability in n/a, published on 14 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2025-63680?
It affects 1 product.
Products include Nero Backitup.
How do I fix CVE-2025-63680?
No fix has been published for CVE-2025-63680 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-63680 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63680 exists.
Sources
Also known as GHSA-qhf9-chp9-gc7j.