CVE-2025-63680: Path Traversal
Source CVE Database V5
Not known to be exploited · CVSS 8.6 High.
Data as of 26 Oct 2026, 11:42 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
- Monitor for vendor updates and apply patches immediately once released to address the path parsing/UI rendering flaw.
- Until patches are available, restrict user ability to click or interact with backup entries that originate from untrusted or external sources.
- Educate users about the risk of clicking unexpected or suspicious backup entries, emphasizing caution with UI elements that resemble folders but may be malicious.
- Implement application whitelisting and endpoint protection solutions that can detect and block execution of unauthorized scripts or binaries launched via ShellExecuteW.
- Use Windows Group Policy to disable or restrict execution of scripts with extensions commonly exploited via PATHEXT fallback (e.g., .BAT, .CMD) in user directories or backup folders.
- Employ network segmentation to limit the spread of malware if arbitrary code execution occurs.
- Regularly audit backup files and folder structures for anomalous naming patterns such as trailing dots or suspicious scripts.
- Enhance logging and monitoring to detect unusual ShellExecuteW invocations or user interactions with backup software UI components.
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.