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CVE-2026-15141— Referer Validation Bypass in TL-WR820N Web Management Interface

Quick assessment

Affected
TP-Link Systems Inc. TL-WR820N v2
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 TL-WR820N是中国TP-Link公司的一款无线中继器。 TP-Link TL-WR820N 存在输入验证错误漏洞，该漏洞源于Web管理界面依赖HTTP Referer头进行请求验证且验证逻辑不足，可能导致相邻攻击者通过访问Web管理界面获取设备配置详情和其他敏感信息。

CVSS 5.3 · Medium EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1502

Affected Version Matrix 1

VendorProduct Version RangeStatus
TP-Link Systems Inc. TL-WR820N v2 < 1.15.20 Build 260611 Rel.29552n affected
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I. Basic Information for CVE-2026-15141

Vulnerability Information
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Vulnerability Title
Referer Validation Bypass in TL-WR820N Web Management Interface
Source: CVE Program / CVE List V5
Vulnerability Description
The web interface of the affected device relies on the HTTP referrer header as part of request validation.  Requests containing empty Referer value, or omitting the Referer header entirely, may be accepted and processed due to insufficient validation logic. Successful exploitation may allow an adjacent attacker with access to the web management interface to obtain device configuration details and other sensitive 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:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link TL-WR820N 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link TL-WR820N是中国TP-Link公司的一款无线中继器。 TP-Link TL-WR820N 存在输入验证错误漏洞，该漏洞源于Web管理界面依赖HTTP Referer头进行请求验证且验证逻辑不足，可能导致相邻攻击者通过访问Web管理界面获取设备配置详情和其他敏感信息。
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. TL-WR820N v2 0 ~ 1.15.20 Build 260611 Rel.29552n -

II. Public POCs for CVE-2026-15141

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III. Intelligence Information for CVE-2026-15141

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Vendor Advisories for CVE-2026-15141 (1)

Vendor Pages for CVE-2026-15141 (1)

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-346

V. Comments for CVE-2026-15141

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