Cyber Resilience

CVE-2026-32669

RCE in Buffalo Wcr-1166Dhpl Firmware ≤ 1.01

Published
27 March 2026
Modified
31 March 2026
Patch / advisory
CVSS Score v4 8.7
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0027 19th percentile
Risk Priority 55 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-32669 is a high-severity Code Injection (CWE-94) vulnerability in Buffalo Wcr-1166Dhpl Firmware. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 19th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

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.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

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

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
T1059.002 AppleScript Execution
Adversaries may abuse AppleScript for execution.
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
T1059.005 Visual Basic Execution
Adversaries may abuse Visual Basic (VB) for execution.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-66150Shared CWE-94
CVE-2023-49109Shared CWE-94
CVE-2023-6288Shared CWE-94
CVE-2023-33229Shared CWE-94
CVE-2024-9593Shared CWE-94
CVE-2024-57099Shared CWE-94
CVE-2024-39669Shared CWE-94
CVE-2026-21853Shared CWE-94
CVE-2026-72819Shared CWE-94
CVE-2025-32798Shared CWE-94

Affected Assets

buffalo
wcr-1166dhpl firmware
≤ 1.01
buffalo
wsr3600be4-kh firmware
≤ 6.02
buffalo
wsr3600be4p firmware
≤ 5.02
buffalo
wxr-1750dhp firmware
≤ 2.63
buffalo
wxr-1750dhp2 firmware
≤ 2.63
buffalo
wxr18000be10p firmware
≤ 5.03
buffalo
wxr-1900dhp firmware
≤ 2.53
buffalo
wxr-1900dhp2 firmware
≤ 2.62
buffalo
wxr-1900dhp3 firmware
≤ 2.66
buffalo
wxr-5950ax12 firmware
≤ 3.57
+36 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.1

Mitigating Controls (NIST 800-53 r5) AI

Developer testing and evaluation finds code paths that accept and execute externally influenced strings.

Input validation directly stops untrusted data from being used to construct executable code without neutralization.

Least privilege limits the damage an injected code fragment can perform once executed.

Requiring documented secure development standards and tools enforces use of safe code-generation APIs and escaping.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly target injection flaws via secure coding and testing (mostly), yet as a single broad outcome it leaves many code-generation specifics unaddressed (partial).

PR.DS-10 none match
prevents

PR.DS-10 protects runtime data confidentiality/integrity but has no bearing on neutralizing externally influenced input during code generation, so neither direction shows any preventive effect.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

prevents

Banning unapproved code samples and unauthenticated web services, combined with secure-coding standards and SAST, prevents the dynamic generation or inclusion of attacker-supplied code.

References