CVE-2026-8699

Published Jul 2, 2026

Last updated 4 months ago

CVSS high 7.0
XSS

Overview

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
f23511db-6c3e-4e32-a477-6aa17d310630
NVD status
Deferred

Risk scores

CVSS 4.0

Type
Secondary
Base score
7
Impact score
-
Exploitability score
-
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity
HIGH

Weaknesses

f23511db-6c3e-4e32-a477-6aa17d310630
CWE-79

Social media

Hype score
Not currently trending

  1. 🚨*CVE* CVE-2026-8699 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 v… https://t.co/grSzYq2TDw ----- Traducción: CVE-2026-8699 Se … https://t.co/utmtNg

    @infoflowcloud

    2 Jul 2026

    40 Impressions

    0 Retweets

    0 Likes

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    0 Replies

    0 Quotes

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References

Sources include official advisories and independent security research.