What is CVE-2026-32669?

CVE-2026-32669 is a critical-severity vulnerability in Buffalo Fs-M1266, classified under Code Injection. CVSS score: 9.8/10. Published 2026-03-27.

How severe is CVE-2026-32669?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Buffalo Fs-M1266

CVE-2026-32669

Code injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary code may be executed on the products.

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.003 (18.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Buffalo Fs-m1266
Buffalo Fs-m1266_firmware
Buffalo Fs-s1266
Buffalo Fs-s1266_firmware
Buffalo Vr-u300w
Buffalo Vr-u300w_firmware
Buffalo Vr-u500x
Buffalo Vr-u500x_firmware
Buffalo Wapm-1266r
Buffalo Wapm-1266r_firmware

Weakness classification (CWE)

CWE-94 — Code Injection

References

vultures@jpcert.or.jp (Vendor Advisory)
vultures@jpcert.or.jp (Third Party Advisory)

Frequently asked questions

What is CVE-2026-32669?: CVE-2026-32669 is a critical-severity vulnerability in Buffalo Fs-M1266, classified under Code Injection. CVSS score: 9.8/10. Published 2026-03-27.
How severe is CVE-2026-32669?: Critical severity. CVSS v3 base score is 9.8 out of 10.