What is CVE-2026-32678?

CVE-2026-32678 is a high-severity vulnerability in Buffalo Fs-M1266, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2026-03-27.

How severe is CVE-2026-32678?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Buffalo Fs-M1266

CVE-2026-32678

Authentication bypass issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to alter critical configuration settings without authentication.

Published 2026-03-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

www.buffalo.jp/news/detail/20260323-01.html (Vendor Advisory)
jvn.jp/en/jp/JVN83788689/ (Third Party Advisory)

Frequently asked questions

What is CVE-2026-32678?: CVE-2026-32678 is a high-severity vulnerability in Buffalo Fs-M1266, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 7.5/10. Published 2026-03-27.
How severe is CVE-2026-32678?: High severity. CVSS v3 base score is 7.5 out of 10.