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CVE-2026-17176: OS Command Injection Vulnerability in Deco Devices

• Severity: high (CVSS 7.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-01
• Weakness: CWE-78

Description

An OS command injection vulnerability in the TDDP module of Deco BE11000 and Deco M9 Plus allows an adjacent network attacker to execute arbitrary commands with root privileges by sending a crafted UDP packet. Successful exploitation may lead to complete device compromise, including unauthorized command execution, modification of device settings, and loss of confidentiality, integrity, and availability

Affected products

• TP-Link Systems Inc. Deco BE11000 V2: before 1.3.5 Build 26071712 — fixed in 1.3.5 Build 26071712
• TP-Link Systems Inc. Deco M9 Plus V2: before 1.9.2 Build 20260818 — fixed in 1.9.2 Build 20260818

How to fix

Upgrade to a fixed version: TP-Link Systems Inc. Deco BE11000 V2 1.3.5 Build 26071712; TP-Link Systems Inc. Deco M9 Plus V2 1.9.2 Build 20260818. Check the vendor advisory for mitigations.

References

• https://www.tp-link.com/en/support/download/deco-m9-plus/v2/
• https://www.tp-link.com/en/support/faq/5293/
• https://www.tp-link.com/us/support/download/deco-be11000/#Firmware
• https://www.tp-link.com/us/support/download/deco-m9-plus/v2/#Firmware

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