PT-2025-47633 · Unknown+1 · Quark Cloud Drive+1

Published 2025-11-20 · Updated 2025-11-21 · CVE-2025-63685

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Quark Cloud Drive version 3.23.2

Description The software contains a flaw due to insecure loading of system libraries. The application does not validate the path or signature of regsvr32.exe when loading it. An attacker could place a malicious DLL in the application’s startup directory, leading to its execution when the program is launched.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Weakness Enumeration

CWE-491

Related Identifiers

CVE-2025-63685

Affected Products

Quark Cloud Drive

Regsvr32.Exe

References · 6

• 🔥 https://github.com/QIU-DIE/CVE/issues/5 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-63685 · Security Note
• https://osv.dev/vulnerability/CVE-2025-63685 · Vendor Advisory
• https://t.me/CVEtracker/37869 · Telegram Post
• https://twitter.com/CVEnew/status/1991616448532304178 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1991629809588244781 · Twitter Post