Vulnerability · Published Jul 2, 2026 · Assigned by TPLink
CVE-2026-8699Stored Cross-Site Scripting (XSS) in TP-Link Archer C5 Web Management Interface
High 7.0
In plain English
A high-severity cross-site scripting in Archer C5 v6.8 from TP-Link Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TP-Link Systems Inc. | Archer C5 v6.8 | 0 – before 0.2.0 3.0.0 v6063.0 Build 260331 Rel.37416n |
Weakness: CWE-79 · Vector: 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
References
- https://www.tp-link.com/en/support/faq/5165/ vendor-advisory