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CVE-2026-5040— Weak Password Hashing Mechanism in TP-Link Deco M5

Quick assessment

Affected
TP-Link Systems Inc. Deco M5 Deco M5 V1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TP-Link Deco M5是中国TP-Link公司的一款网状WiFi路由器产品。 TP-Link Deco M5 V1 1.9.4 Build 20260312 Rel.17129之前版本存在加密问题漏洞，该漏洞源于使用弱口令哈希机制存储用户凭据，可能导致攻击者在获取哈希值后进行暴力破解或字典攻击，造成身份验证凭据泄露，进而未经授权访问设备管理功能。

AI Predicted 7.5 Difficulty: Easy EPSS 0.13% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
TP-Link Systems Inc. Deco M5 Deco M5 V1 < 1.9.4 Build 20260312 Rel.17129 affected
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I. Basic Information for CVE-2026-5040

Vulnerability Information
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Vulnerability Title
Weak Password Hashing Mechanism in TP-Link Deco M5
Source: CVE Program / CVE List V5
Vulnerability Description
TP-Link Deco M5 v1 uses a weak password hashing mechanism to store user credentials. An attacker who obtains the password hash through system compromise or privileged access could perform brute-force or dictionary attacks. Successful exploitation may result in disclosure of authentication credentials, enabling unauthorized access to device management functions, depending on the privileges associated with the recovered password. The primary security impact is loss of confidentiality.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用具有不充分计算复杂性的口令哈希
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Deco M5 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link Deco M5是中国TP-Link公司的一款网状WiFi路由器产品。 TP-Link Deco M5 V1 1.9.4 Build 20260312 Rel.17129之前版本存在加密问题漏洞，该漏洞源于使用弱口令哈希机制存储用户凭据，可能导致攻击者在获取哈希值后进行暴力破解或字典攻击，造成身份验证凭据泄露，进而未经授权访问设备管理功能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. Deco M5 Deco M5 V1 0 ~ 1.9.4 Build 20260312 Rel.17129 -

II. Public POCs for CVE-2026-5040

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III. Intelligence Information for CVE-2026-5040

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Vendor Advisories for CVE-2026-5040 (1)

Vendor Pages for CVE-2026-5040 (1)

Same Patch Batch · TP-Link Systems Inc. · 2026-07-14 · 4 CVEs total

CVE-2026-15428 OS Command Injection in TR-069 (CWMP) Management Interface in TP-Link Archer VX1800v
CVE-2026-15427 OS Command Injection in TR-069 (CWMP) Management Interface in TP-Link Archer VX1800v
CVE-2026-15429 Privilege Escalation via Improper Input Sanitization in TP-Link Archer VX1800v

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-916

V. Comments for CVE-2026-5040

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