Is CVE-2025-63685 actively exploited?

No active exploitation of CVE-2025-63685 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-63685 be exploited remotely?

Yes. CVE-2025-63685 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-63685?

CVE-2025-63685 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2025-63685

CWE-491Published: November 20, 2025· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

This critical DLL Hijacking vulnerability in Quark Cloud Drive v3.23.2 allows an attacker to execute arbitrary code. The application insecurely loads system libraries without validating their path or signature, enabling a malicious DLL to be loaded and executed when the program starts. With a CVSS score of 9.8, this flaw poses a severe risk of system compromise.

There are no public exploits known for this vulnerability. The attack is remotely exploitable over the network with low complexity.

Recommended Action

Upgrade Quark Cloud Drive to a patched version beyond 3.23.2. Ensure applications validate the authenticity and path of loaded DLLs and restrict write access to application directories.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-63685 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.