CVE-2026-71961: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Shenzhen Cudy Technology Co., Ltd. WR3000 2.0
CVE-2026-71961 is an OS command injection vulnerability in Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 firmware versions before 2.5.24. Authenticated attackers can exploit this flaw via the mesh MQTT command interface to execute arbitrary OS commands with root privileges. The vulnerability arises because the sync_command binary forwards unsanitized input directly to a shell execution sink in command.lua, enabling full system compromise.
AI Analysis
Technical Summary
The WR3000 2.0 router firmware prior to version 2.5.24 contains an OS command injection vulnerability. Authenticated attackers with access to the mesh MQTT command interface can send specially crafted input that is not properly sanitized. This input is passed by the sync_command binary directly to a shell execution sink in the command.lua script, allowing execution of arbitrary OS commands with root privileges. This vulnerability enables attackers to achieve full root-level compromise of the device.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary operating system commands with root privileges on the affected device, leading to full system compromise. This could result in unauthorized control over the device and potentially the network it is connected to.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor Shenzhen Cudy Technology Co., Ltd. advisories for updates. Until a fix is available, restrict access to the mesh MQTT command interface to trusted users only to reduce risk.
CVE-2026-71961: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Shenzhen Cudy Technology Co., Ltd. WR3000 2.0
Description
CVE-2026-71961 is an OS command injection vulnerability in Shenzhen Cudy Technology Co., Ltd. WR3000 2.0 firmware versions before 2.5.24. Authenticated attackers can exploit this flaw via the mesh MQTT command interface to execute arbitrary OS commands with root privileges. The vulnerability arises because the sync_command binary forwards unsanitized input directly to a shell execution sink in command.lua, enabling full system compromise.
CVSS v4.0
Score 8.7high
Affected software
Shenzhen Cudy Technology Co., Ltd.
WR3000 2.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The WR3000 2.0 router firmware prior to version 2.5.24 contains an OS command injection vulnerability. Authenticated attackers with access to the mesh MQTT command interface can send specially crafted input that is not properly sanitized. This input is passed by the sync_command binary directly to a shell execution sink in the command.lua script, allowing execution of arbitrary OS commands with root privileges. This vulnerability enables attackers to achieve full root-level compromise of the device.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary operating system commands with root privileges on the affected device, leading to full system compromise. This could result in unauthorized control over the device and potentially the network it is connected to.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch link is provided, users should monitor Shenzhen Cudy Technology Co., Ltd. advisories for updates. Until a fix is available, restrict access to the mesh MQTT command interface to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-08T16:43:04.177Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a85bfc5acd9273b49338bdf
Added to database: 08/19/2026, 14:37:57 UTC
Last enriched: 09/07/2026, 15:19:49 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 71
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.