CVE-2026-32669

CriticalRCE

Published: 27 March 2026

Published

27 March 2026

Modified

31 March 2026

KEV Added

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Patch

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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0005 14.2th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-32669 is a critical-severity Code Injection (CWE-94) vulnerability in Buffalo Wcr-1166Dhpl Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly mitigates the code injection vulnerability by identifying, reporting, and patching the specific flaw in BUFFALO Wi-Fi router firmware as per vendor advisories.

SI-10 Information Input Validation good match

prevent

Prevents code injection attacks like CVE-2026-32669 by validating all external information inputs to the router's services.

SI-16 Memory Protection partial match

prevent

Mitigates exploitation of the code injection vulnerability by implementing memory protections such as non-executable stacks or ASLR on the router.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Remote unauthenticated code injection (CWE-94) in Buffalo router web/management interface directly enables T1190 Exploit Public-Facing Application for arbitrary code execution and full device compromise.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

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

Deeper analysisAI

CVE-2026-32669 is a code injection vulnerability (CWE-94) present in BUFFALO Wi-Fi router products. If exploited, it allows arbitrary code execution on the affected products. The vulnerability received a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), classifying it as critical due to its high impact potential.

Remote attackers can exploit this vulnerability over the network with low complexity, without requiring authentication, privileges, or user interaction. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, enabling full compromise of the router, such as persistent control or further network pivoting.

Mitigation guidance is detailed in advisories published by JVN at https://jvn.jp/en/jp/JVN83788689/ and Buffalo at https://www.buffalo.jp/news/detail/20260323-01.html.