CVE-2026-27650 is a high-severity OS Command Injection vulnerability affecting various Buffalo Wi-Fi router products. If exploited, this vulnerability allows attackers to execute arbitrary OS commands on the affected devices. The potential for unauthorized command execution raises significant security concerns, particularly within networks where these routers are deployed.
The CVSS score for this vulnerability is 8.6, indicating a high severity level. Organizations utilizing affected Buffalo products should take immediate action to understand their exposure and the risks associated with this vulnerability. Given its potential to compromise device integrity and confidentiality, prioritizing remediation efforts is essential.
The exploitation status of CVE-2026-27650 indicates no known public exploits at this time. However, the nature of the vulnerability suggests that it could be a target for attackers looking to leverage command execution capabilities for further intrusions. Therefore, organizations must remain vigilant.
Organizations should prioritize patching immediately to mitigate risks associated with this vulnerability. Effective risk management strategies must include timely updates and monitoring for any abnormal behavior on networked devices.
Vulnerability Details
The vulnerability allows for OS Command Injection in Buffalo Wi-Fi routers. The CVSS score of 8.6 classifies it as high severity, emphasizing the need for urgent action. The affected products include various models of Buffalo routers, and the vulnerability was published on March 27, 2026.
The official description from JPCERT states that the vulnerability enables the execution of arbitrary OS commands, which could lead to severe security breaches.
The vulnerability is classified under CWE-78, indicating a command injection risk. Organizations must ensure that their systems are updated to mitigate this risk.
Technical Analysis
The root cause of this vulnerability lies in the inadequate input validation in the affected Buffalo firmware, allowing attackers to inject malicious commands. The attack vector is network-based, requiring low complexity with no privileges needed for execution. Active user interaction may be required to exploit the vulnerability, which could involve tricking a user into clicking a malicious link or performing a specific action.
The vulnerability impacts confidentiality, integrity, and availability, indicating that successful exploitation could lead to unauthorized access, data compromise, or service disruptions.
Risk & Impact Analysis
The real-world risk of CVE-2026-27650 is substantial, especially for organizations relying on Buffalo Wi-Fi routers. The potential for arbitrary command execution poses a direct threat to network security. Attackers could exploit this vulnerability to gain elevated privileges, potentially leading to a wider compromise within the network.
The urgency for remediation is high due to the critical nature of the vulnerabilities. Organizations must assess their exposure and implement patches as soon as they become available to protect their infrastructure.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following Buffalo Wi-Fi router firmware versions are affected by CVE-2026-27650: wcr-1166dhpl_firmware, wsr3600be4-kh_firmware, wsr3600be4p_firmware, wxr-1750dhp_firmware, wxr-1750dhp2_firmware, wxr18000be10p_firmware, wxr-1900dhp_firmware, wxr-1900dhp2_firmware, wxr-1900dhp3_firmware, wxr-5950ax12_firmware, wxr-6000ax12b_firmware, wxr-6000ax12p_firmware, wxr-6000ax12s_firmware, wzr-1166dhp_firmware, wzr-1166dhp2_firmware, wzr-1750dhp_firmware, wzr-1750dhp2_firmware, wzr-s1750dhp_firmware, wrm-d2133hp_firmware, wrm-d2133hs_firmware, wtr-m2133hp_firmware, wtr-m2133hs_firmware, wem-1266_firmware, wem-1266wp_firmware, vr-u300w_firmware, vr-u500x_firmware, wapm-1266r_firmware, wapm-1266wdpr_firmware, wapm-1266wdpra_firmware, wapm-1750d_firmware, wapm-2133r_firmware, wapm-2133tr_firmware, wapm-ax4r_firmware, wapm-ax8r_firmware, wapm-axetr_firmware, waps-1266_firmware, waps-ax4_firmware, fs-m1266_firmware, fs-s1266_firmware, wzr-600dhp_firmware, wzr-600dhp2_firmware, wzr-600dhp3_firmware, wzr-900dhp_firmware, wzr-900dhp2_firmware, wzr-s600dhp_firmware, wzr-s900dhp_firmware.
Mitigation & Remediation
To mitigate the vulnerabilities associated with CVE-2026-27650, organizations should ensure they apply available patches from Buffalo for the affected firmware versions. If immediate patching is not feasible, consider implementing network controls to limit access to the devices.
Organizations should also conduct regular security assessments to identify and remediate potential vulnerabilities. Continuous security testing practices can help maintain the integrity of the network.
For further guidance on ensuring your network security, organizations may explore penetration testing services to identify weaknesses.
Detection Guidance
Organizations should monitor logs for any suspicious command executions and analyze behavioral anomalies that may indicate exploitation attempts. Network signatures that detect unusual outbound connections from the routers should also be established.
Regular audits of system changes can help identify unauthorized modifications that may result from exploitation.
AppSecure Threat Intelligence Insight
The existence of CVE-2026-27650 highlights the importance of robust input validation in firmware development. Security teams should prioritize secure coding practices to prevent similar vulnerabilities from arising in future products.
This vulnerability serves as a reminder of the criticality of timely updates and the need for organizations to maintain an active vulnerability management program. Continuous monitoring and assessment will help detect and mitigate vulnerabilities effectively.
For further insights on vulnerability management, organizations can refer to resources on designing a vulnerability management program and best practices for penetration testing.
Additionally, organizations may want to consider penetration testing methodology to ensure all aspects of security are addressed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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