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CVE-2026-76653— Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600

Quick assessment

Affected
TP-Link Systems Inc. TL-MR6400 v8
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.

在 Archer MR600（v2、v3 和 v5）以及 TL-MR6400 v8 版本的 VPN 配置管理中，已发现一处认证缺失漏洞，其根源在于访问控制机制不当；未经身份验证的远程攻击者可能无需有效凭据即可访问并修改 VPN 配置信息。 成功利用该漏洞后，未经身份验证的远程攻击者可披露并修改 VPN 配置信息。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-76653

Vulnerability Information
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Vulnerability Title
Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600
Source: CVE Program / CVE List V5
Vulnerability Description
A missing authentication vulnerability in the VPN configuration management has been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8 due to improper access control; a remote unauthenticated attacker may be able to access and modify VPN configuration information without valid credentials. Successful exploitation may allow a remote unauthenticated attacker to disclose and modify VPN configuration information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TP-Link Systems Inc. TL-MR6400 v8 0 ~ 1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n -
TP-Link Systems Inc. Archer MR600 v3 ~ MR600(EU)_V3_1.4.0 Build 260827 -

II. Public POCs for CVE-2026-76653

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III. Intelligence Information for CVE-2026-76653

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Vendor Advisories for CVE-2026-76653 (1)

Vendor Pages for CVE-2026-76653 (2)

Same Patch Batch · TP-Link Systems Inc. · 2026-09-10 · 4 CVEs total

CVE-2026-17176 7.7 HIGH OS command injection Vulnerability in Deco BE11000
CVE-2026-84941 6.9 MEDIUM Omada Controller XML External Entity (XXE) Injection in SAML IdP Metadata Parsing Leading
CVE-2026-76652 4.8 MEDIUM Authenticated Directory Traversal Vulnerability in File Upload Functionality in TP-Link TL

IV. Related Vulnerabilities

Same product: TL-MR6400 v8
Same vendor: TP-Link Systems Inc.
Same weakness: CWE-126

V. Comments for CVE-2026-76653

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