What is CVE-2025-66954?

CVE-2025-66954 is a medium-severity vulnerability in N/a, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-04-20.

How severe is CVE-2025-66954?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-66954 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in N/a

CVE-2025-66954

A vulnerability exists in the Buffalo Link Station version 1.85-0.01 that allows unauthenticated or guest-level users to enumerate valid usernames and their associated privilege roles. The issue is triggered by modifying a parameter within…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

Public proof-of-concept exploits

DBmonster19/CVE-2025-66954

References

cve@mitre.org

Frequently asked questions

What is CVE-2025-66954?: CVE-2025-66954 is a medium-severity vulnerability in N/a, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-04-20.
How severe is CVE-2025-66954?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-66954 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.