Is CVE-2026-3963 actively exploited?

No active exploitation of CVE-2026-3963 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3963 be exploited remotely?

Yes. CVE-2026-3963 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3963?

CVE-2026-3963 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-3963

LOW

CVE-2026-3963

CWE-320Published: March 11, 2026· Updated: Mar 12, 2026

3.7

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.2th

Official Description

A security flaw has been discovered in perfree go-fastdfs-web up to 1.3.7. This affects the function rememberMeManager of the file src/main/java/com/perfree/config/ShiroConfig.java of the component Apache Shiro RememberMe. Performing a manipulation results in use of hard-coded cryptographic key . The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is reported as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Technical Analysis

CVE-2026-3963 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.