9.8
CRITICAL
CVSS 3.1
CVE-2026-33280
Buffalo Wi-Fi Router OS Command Injection Vulnerability
Overview
Description
Hidden functionality issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to gain access to the product’s debugging functionality, resulting in the execution of arbitrary OS commands.
Details
INFO
Published Date :
March 27, 2026, 6:16 a.m.
Last Modified :
March 31, 2026, 7:03 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Impact
Affected Products
The following products are affected by CVE-2026-33280
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | HIGH | ede6fdc4-6654-4307-a26d-3331c018e2ce | ||||
| CVSS 3.0 | HIGH | [email protected] | ||||
| CVSS 3.0 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | ede6fdc4-6654-4307-a26d-3331c018e2ce | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
Update router firmware to remove hidden debugging functionality and prevent OS command execution.
- Update router firmware to the latest version.
- Disable unused debugging features.
- Restrict access to administrative interfaces.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-33280.
| URL | Resource |
|---|---|
| https://jvn.jp/en/jp/JVN83788689/ | Third Party Advisory |
| https://www.buffalo.jp/news/detail/20260323-01.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-33280 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-33280
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-33280 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-33280 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wcr-1166dhpl_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.01 OR cpe:2.3:h:buffalo:wcr-1166dhpl:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wsr3600be4-kh_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 6.02 OR cpe:2.3:h:buffalo:wsr3600be4-kh:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wsr3600be4p_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 5.02 OR cpe:2.3:h:buffalo:wsr3600be4p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-1750dhp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.63 OR cpe:2.3:h:buffalo:wxr-1750dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-1750dhp2_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.63 OR cpe:2.3:h:buffalo:wxr-1750dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr18000be10p_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 5.03 OR cpe:2.3:h:buffalo:wxr18000be10p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-1900dhp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.53 OR cpe:2.3:h:buffalo:wxr-1900dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-1900dhp2_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.62 OR cpe:2.3:h:buffalo:wxr-1900dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-1900dhp3_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.66 OR cpe:2.3:h:buffalo:wxr-1900dhp3:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-5950ax12_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.57 OR cpe:2.3:h:buffalo:wxr-5950ax12:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-6000ax12b_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.57 OR cpe:2.3:h:buffalo:wxr-6000ax12b:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-6000ax12p_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.57 OR cpe:2.3:h:buffalo:wxr-6000ax12p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wxr-6000ax12s_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.57 OR cpe:2.3:h:buffalo:wxr-6000ax12s:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-1166dhp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20 OR cpe:2.3:h:buffalo:wzr-1166dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-1166dhp2_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.20 OR cpe:2.3:h:buffalo:wzr-1166dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-1750dhp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.32 OR cpe:2.3:h:buffalo:wzr-1750dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-1750dhp2_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.33 OR cpe:2.3:h:buffalo:wzr-1750dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-s1750dhp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.34 OR cpe:2.3:h:buffalo:wzr-s1750dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wrm-d2133hp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.01 OR cpe:2.3:h:buffalo:wrm-d2133hp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wrm-d2133hs_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.01 OR cpe:2.3:h:buffalo:wrm-d2133hs:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wtr-m2133hp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.01 OR cpe:2.3:h:buffalo:wtr-m2133hp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wtr-m2133hs_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.01 OR cpe:2.3:h:buffalo:wtr-m2133hs:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wem-1266_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.87 OR cpe:2.3:h:buffalo:wem-1266:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wem-1266wp_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.87 OR cpe:2.3:h:buffalo:wem-1266wp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:vr-u300w_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:vr-u300w:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:vr-u500x_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:vr-u500x:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-1266r_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-1266r:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-1266wdpr_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-1266wdpr:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-1266wdpra_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-1266wdpra:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-1750d_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.07 OR cpe:2.3:h:buffalo:wapm-1750d:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-2133r_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-2133r:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-2133tr_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-2133tr:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-ax4r_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-ax4r:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-ax8r_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-ax8r:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wapm-axetr_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:wapm-axetr:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:waps-1266_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:waps-1266:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:waps-ax4_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.42 OR cpe:2.3:h:buffalo:waps-ax4:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:fs-m1266_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.13 OR cpe:2.3:h:buffalo:fs-m1266:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:fs-s1266_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.13 OR cpe:2.3:h:buffalo:fs-s1266:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-600dhp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-600dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-600dhp2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-600dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-600dhp3_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-600dhp3:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-900dhp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-900dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-900dhp2_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-900dhp2:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-s600dhp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-s600dhp:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:buffalo:wzr-s900dhp_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:buffalo:wzr-s900dhp:-:*:*:*:*:*:*:* Added Reference Type JPCERT/CC: https://jvn.jp/en/jp/JVN83788689/ Types: Third Party Advisory Added Reference Type JPCERT/CC: https://www.buffalo.jp/news/detail/20260323-01.html Types: Vendor Advisory -
New CVE Received by [email protected]
Mar. 27, 2026
Action Type Old Value New Value Added Description Hidden functionality issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to gain access to the product’s debugging functionality, resulting in the execution of arbitrary OS commands. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/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 Added CVSS V3 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-912 Added Reference https://jvn.jp/en/jp/JVN83788689/ Added Reference https://www.buffalo.jp/news/detail/20260323-01.html
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.