CVE-2025-63685

Name: CVE-2025-63685
Creator: NVD / NIST
Published: 2025-11-20T21:16:06.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2025-63685 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Quark Cloud Drive v3.23.2 has a DLL Hijacking vulnerability. This vulnerability stems from the insecure loading of system libraries. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

Quark Cloud Drive v3.23.2 has a DLL Hijacking vulnerability. This vulnerability stems from the insecure loading of system libraries. Specifically, the application does not validate the path or signature of [regsvr32.exe] it loads. An attacker can place a crafted malicious DLL in the application's startup directory, which will be loaded and executed when the user launches the program.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-491

Affected Software

Vendor	Product	Versions
Quark	Quark Cloud Drive	3.23.2

References

https://github.com/QIU-DIE/CVE/issues/5Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Nov 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-63685?

How severe is CVE-2025-63685?

CVE-2025-63685 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2025-63685?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-63685?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST