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CVE-2026-8699— Stored Cross-Site Scripting (XSS) in TP-Link Archer C5 Web Management Interface

Quick assessment

Affected
TP-Link Systems Inc. Archer C5 v6.8
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 archer c5是中国TP-Link公司的一款双频无线路由器。 TP-Link Archer C5存在跨站脚本漏洞，该漏洞源于Web管理界面中因服务器端验证不足和对用户控制输入输出编码不当，可能导致存储型跨站脚本攻击。

AI Predicted 6.5 Difficulty: Easy EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
TP-Link Systems Inc. Archer C5 v6.8 < 0.2.0 3.0.0 v6063.0 Build 260331 Rel.37416n affected
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I. Basic Information for CVE-2026-8699

Vulnerability Information
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Vulnerability Title
Stored Cross-Site Scripting (XSS) in TP-Link Archer C5 Web Management Interface
Source: CVE Program / CVE List V5
Vulnerability Description
A stored Cross-Site Scripting (XSS) vulnerability has been identified in the web-based management interface of Archer C5 v6.8 routers, due to insufficient server-side validation and lack of proper output encoding of user-controlled input in a certain field.  An attacker with administrative privileges can inject crafted HTML or JS payloads into the affected field. The payload is stored and later executed when the affected page is rendered in an administrator's browser.Successful exploitation allows execution of arbitrary JavaScript in an admin's browser, potentially leading to session hijacking and unauthorized access to router configuration, possibly resulting in exposure of sensitive data and modification of device settings. The vulnerability affects ISP-managed firmware variants of the product. Remediation is coordinated through service providers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
TP-Link Archer C5 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TP-Link archer c5是中国TP-Link公司的一款双频无线路由器。 TP-Link Archer C5存在跨站脚本漏洞，该漏洞源于Web管理界面中因服务器端验证不足和对用户控制输入输出编码不当，可能导致存储型跨站脚本攻击。
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. Archer C5 v6.8 0 ~ 0.2.0 3.0.0 v6063.0 Build 260331 Rel.37416n -

II. Public POCs for CVE-2026-8699

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III. Intelligence Information for CVE-2026-8699

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Vendor Advisories for CVE-2026-8699 (1)

IV. Related Vulnerabilities

Same vendor: TP-Link Systems Inc.
Same weakness: CWE-79