CVE-2026-27650

Summary

CVE	CVE-2026-27650
State	PUBLISHED
Assigner	jpcert
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-03-27 06:16:38 UTC
Updated	2026-03-31 19:04:01 UTC
Description	OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary OS command may be executed on the products.

Risk And Classification

Primary CVSS: v4.0 8.6 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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: 0.000630000 probability, percentile 0.195720000 (date 2026-04-01)

Problem Types: CWE-78 | CWE-78 Improper neutralization of special elements used in an OS command ('OS Command Injection')

Version	Source	Type	Score	Severity	Vector
4.0	[email protected]	Secondary	8.6	HIGH	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...`
4.0	CNA	CVSS	8.6	HIGH	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
3.1	[email protected]	Primary	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
3.0	[email protected]	Secondary	8.8	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`
3.0	CNA	CVSS	8.8	HIGH	`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`

CVSS v4.0 Breakdown

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

Active

Confidentiality

High

Integrity

High

Availability

High

Sub Conf.

None

Sub Integrity

None

Sub Availability

None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/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

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

CVSS v3.0 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Hardware	Buffalo	Fs-m1266	-	All	All	All
Operating System	Buffalo	Fs-m1266 Firmware	All	All	All	All
Hardware	Buffalo	Fs-s1266	-	All	All	All
Operating System	Buffalo	Fs-s1266 Firmware	All	All	All	All
Hardware	Buffalo	Vr-u300w	-	All	All	All
Operating System	Buffalo	Vr-u300w Firmware	All	All	All	All
Hardware	Buffalo	Vr-u500x	-	All	All	All
Operating System	Buffalo	Vr-u500x Firmware	All	All	All	All
Hardware	Buffalo	Wapm-1266r	-	All	All	All
Operating System	Buffalo	Wapm-1266r Firmware	All	All	All	All
Hardware	Buffalo	Wapm-1266wdpr	-	All	All	All
Hardware	Buffalo	Wapm-1266wdpra	-	All	All	All
Operating System	Buffalo	Wapm-1266wdpra Firmware	All	All	All	All
Operating System	Buffalo	Wapm-1266wdpr Firmware	All	All	All	All
Hardware	Buffalo	Wapm-1750d	-	All	All	All
Operating System	Buffalo	Wapm-1750d Firmware	All	All	All	All
Hardware	Buffalo	Wapm-2133r	-	All	All	All
Operating System	Buffalo	Wapm-2133r Firmware	All	All	All	All
Hardware	Buffalo	Wapm-2133tr	-	All	All	All
Operating System	Buffalo	Wapm-2133tr Firmware	All	All	All	All
Hardware	Buffalo	Wapm-ax4r	-	All	All	All
Operating System	Buffalo	Wapm-ax4r Firmware	All	All	All	All
Hardware	Buffalo	Wapm-ax8r	-	All	All	All
Operating System	Buffalo	Wapm-ax8r Firmware	All	All	All	All
Hardware	Buffalo	Wapm-axetr	-	All	All	All
Operating System	Buffalo	Wapm-axetr Firmware	All	All	All	All
Hardware	Buffalo	Waps-1266	-	All	All	All
Operating System	Buffalo	Waps-1266 Firmware	All	All	All	All
Hardware	Buffalo	Waps-ax4	-	All	All	All
Operating System	Buffalo	Waps-ax4 Firmware	All	All	All	All
Hardware	Buffalo	Wcr-1166dhpl	-	All	All	All
Operating System	Buffalo	Wcr-1166dhpl Firmware	All	All	All	All
Hardware	Buffalo	Wem-1266	-	All	All	All
Hardware	Buffalo	Wem-1266wp	-	All	All	All
Operating System	Buffalo	Wem-1266wp Firmware	All	All	All	All
Operating System	Buffalo	Wem-1266 Firmware	All	All	All	All
Hardware	Buffalo	Wrm-d2133hp	-	All	All	All
Operating System	Buffalo	Wrm-d2133hp Firmware	All	All	All	All
Hardware	Buffalo	Wrm-d2133hs	-	All	All	All
Operating System	Buffalo	Wrm-d2133hs Firmware	All	All	All	All
Hardware	Buffalo	Wsr3600be4-kh	-	All	All	All
Operating System	Buffalo	Wsr3600be4-kh Firmware	All	All	All	All
Hardware	Buffalo	Wsr3600be4p	-	All	All	All
Operating System	Buffalo	Wsr3600be4p Firmware	All	All	All	All
Hardware	Buffalo	Wtr-m2133hp	-	All	All	All
Operating System	Buffalo	Wtr-m2133hp Firmware	All	All	All	All
Hardware	Buffalo	Wtr-m2133hs	-	All	All	All
Operating System	Buffalo	Wtr-m2133hs Firmware	All	All	All	All
Hardware	Buffalo	Wxr-1750dhp	-	All	All	All
Hardware	Buffalo	Wxr-1750dhp2	-	All	All	All
Operating System	Buffalo	Wxr-1750dhp2 Firmware	All	All	All	All
Operating System	Buffalo	Wxr-1750dhp Firmware	All	All	All	All
Hardware	Buffalo	Wxr-1900dhp	-	All	All	All
Hardware	Buffalo	Wxr-1900dhp2	-	All	All	All
Operating System	Buffalo	Wxr-1900dhp2 Firmware	All	All	All	All
Hardware	Buffalo	Wxr-1900dhp3	-	All	All	All
Operating System	Buffalo	Wxr-1900dhp3 Firmware	All	All	All	All
Operating System	Buffalo	Wxr-1900dhp Firmware	All	All	All	All
Hardware	Buffalo	Wxr-5950ax12	-	All	All	All
Operating System	Buffalo	Wxr-5950ax12 Firmware	All	All	All	All
Hardware	Buffalo	Wxr-6000ax12b	-	All	All	All
Operating System	Buffalo	Wxr-6000ax12b Firmware	All	All	All	All
Hardware	Buffalo	Wxr-6000ax12p	-	All	All	All
Operating System	Buffalo	Wxr-6000ax12p Firmware	All	All	All	All
Hardware	Buffalo	Wxr-6000ax12s	-	All	All	All
Operating System	Buffalo	Wxr-6000ax12s Firmware	All	All	All	All
Hardware	Buffalo	Wxr18000be10p	-	All	All	All
Operating System	Buffalo	Wxr18000be10p Firmware	All	All	All	All
Hardware	Buffalo	Wzr-1166dhp	-	All	All	All
Hardware	Buffalo	Wzr-1166dhp2	-	All	All	All
Operating System	Buffalo	Wzr-1166dhp2 Firmware	All	All	All	All
Operating System	Buffalo	Wzr-1166dhp Firmware	All	All	All	All
Hardware	Buffalo	Wzr-1750dhp	-	All	All	All
Hardware	Buffalo	Wzr-1750dhp2	-	All	All	All
Operating System	Buffalo	Wzr-1750dhp2 Firmware	All	All	All	All
Operating System	Buffalo	Wzr-1750dhp Firmware	All	All	All	All
Hardware	Buffalo	Wzr-600dhp	-	All	All	All
Hardware	Buffalo	Wzr-600dhp2	-	All	All	All
Operating System	Buffalo	Wzr-600dhp2 Firmware	-	All	All	All
Hardware	Buffalo	Wzr-600dhp3	-	All	All	All
Operating System	Buffalo	Wzr-600dhp3 Firmware	-	All	All	All
Operating System	Buffalo	Wzr-600dhp Firmware	-	All	All	All
Hardware	Buffalo	Wzr-900dhp	-	All	All	All
Hardware	Buffalo	Wzr-900dhp2	-	All	All	All
Operating System	Buffalo	Wzr-900dhp2 Firmware	-	All	All	All
Operating System	Buffalo	Wzr-900dhp Firmware	-	All	All	All
Hardware	Buffalo	Wzr-s1750dhp	-	All	All	All
Operating System	Buffalo	Wzr-s1750dhp Firmware	All	All	All	All
Hardware	Buffalo	Wzr-s600dhp	-	All	All	All
Operating System	Buffalo	Wzr-s600dhp Firmware	-	All	All	All
Hardware	Buffalo	Wzr-s900dhp	-	All	All	All
Operating System	Buffalo	Wzr-s900dhp Firmware	-	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	BUFFALO INC.	BUFFALO Wi-Fi Router Products	affected See "References" section	Not specified

References

Reference	Source	Link	Tags
jvn.jp/en/jp/JVN83788689	[email protected]	jvn.jp	Third Party Advisory
www.buffalo.jp/news/detail/20260323-01.html	[email protected]	www.buffalo.jp	Vendor Advisory
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

There are currently no legacy QID mappings associated with this CVE.