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CVE-2026-61876— LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting

Quick assessment

Affected
openwrt luci
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenWRT luci是OpenWRT社区开源的一款路由器配置界面。 OpenWRT luci存在跨站脚本漏洞，该漏洞源于在状态表中呈现DHCPv6租约主机名前未能正确编码，导致相邻网络攻击者注入HTML标记。攻击者可以通过发送包含脚本标签的DHCPv6 Client FQDN，在管理员查看DHCP租约页面时执行脚本。

CVSS 8.8 · High EPSS 1.28% · P68

Public Exploits 1

ExploitDB · 1 EDB-52637 [dos]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
openwrt luci any affected
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I. Basic Information for CVE-2026-61876

Vulnerability Information
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Vulnerability Title
LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting
Source: CVE Program / CVE List V5
Vulnerability Description
LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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
OpenWRT luci 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenWRT luci是OpenWRT社区开源的一款路由器配置界面。 OpenWRT luci存在跨站脚本漏洞，该漏洞源于在状态表中呈现DHCPv6租约主机名前未能正确编码，导致相邻网络攻击者注入HTML标记。攻击者可以通过发送包含脚本标签的DHCPv6 Client FQDN，在管理员查看DHCP租约页面时执行脚本。
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
openwrt luci - -

II. Public POCs for CVE-2026-61876

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 9647 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-61876

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Vendor Advisories for CVE-2026-61876 (2)

Same Patch Batch · openwrt · 2026-07-12 · 3 CVEs total

CVE-2026-59260 8.8 HIGH OpenWrt luci-app-samba4 read ACL remote code execution via smbd
CVE-2026-61875 8.8 HIGH luci-app-upnp Stored XSS via UPnP Port Mapping Description

IV. Related Vulnerabilities

Same product: luci
Same vendor: openwrt
Same weakness: CWE-79

V. Comments for CVE-2026-61876

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