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CVE-2025-8820— Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 wirelessBasic stack-based overflow

Quick assessment

Affected
Linksys RE6250
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.

Linksys RE6250等都是美国Linksys公司的一款无线扩展器。 Linksys多款产品存在安全漏洞，该漏洞源于wirelessBasic函数对submit_SSID1参数操作不当，可能导致栈缓冲区溢出。以下产品和版本受到影响：Linksys RE6250、Linksys RE6300、Linksys RE6350、Linksys RE6500、Linksys RE7000和Linksys RE9000 20250801及之前版本。

CVSS 8.8 · High EPSS 1.05% · P63
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I. Basic Information for CVE-2025-8820

Vulnerability Information
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Vulnerability Title
Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 wirelessBasic stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This vulnerability affects the function wirelessBasic of the file /goform/wirelessBasic. The manipulation of the argument submit_SSID1 leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Linksys多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linksys RE6250等都是美国Linksys公司的一款无线扩展器。 Linksys多款产品存在安全漏洞，该漏洞源于wirelessBasic函数对submit_SSID1参数操作不当，可能导致栈缓冲区溢出。以下产品和版本受到影响：Linksys RE6250、Linksys RE6300、Linksys RE6350、Linksys RE6500、Linksys RE7000和Linksys RE9000 20250801及之前版本。
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
Linksys RE6250 20250801 -
Linksys RE6300 20250801 -
Linksys RE6350 20250801 -
Linksys RE6500 20250801 -
Linksys RE7000 20250801 -
Linksys RE9000 20250801 -

II. Public POCs for CVE-2025-8820

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9919 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-2025-8820

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Proof of Concept for CVE-2025-8820 (1)

Same Patch Batch · Linksys · 2025-08-10 · 5 CVEs total

CVE-2025-8819 8.8 HIGH Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setWan stack-based overflow
CVE-2025-8817 8.8 HIGH Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setLan stack-based overflow
CVE-2025-8816 8.8 HIGH Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setOpMode stack-based overflow
CVE-2025-8818 6.3 MEDIUM Linksys RE6250/RE6300/RE6350/RE6500/RE7000/RE9000 setLan setDFSSetting os command injectio

IV. Related Vulnerabilities

Same product: RE6250
Same vendor: Linksys
Same weakness: CWE-121

V. Comments for CVE-2025-8820

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