QwikSec

Security Database

CVE

CWE

Training

CVE-2025-6752

Published: Jun 27, 2025

Modified: Jun 27, 2025

PUBLISHED

CVSS v3.1

8.8

HIGH

Description

A vulnerability has been found in Linksys WRT1900ACS, EA7200, EA7450 and EA7500 up to 20250619 and classified as critical. This vulnerability affects the function SetDefaultConnectionService of the file /upnp/control/Layer3Forwarding of the component IGD. The manipulation of the argument NewDefaultConnectionService 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.

Vendor	Product	Versions
Linksys	WRT1900ACS	affected `20250619`
Linksys	EA7200	affected `20250619`
Linksys	EA7450	affected `20250619`
Linksys	EA7500	affected `20250619`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

VDB-314050 | Linksys WRT1900ACS/EA7200/EA7450/EA7500 IGD Layer3Forwarding SetDefaultConnectionService stack-based overflow

vdb-entry

technical-description

VDB-314050 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #600638 | Linksys WRT1900ACS Ver. 2.0.3.201002 Stack-based Buffer Overflow

third-party-advisory

https://github.com/feiwuxingxie/cve/blob/main/linksys/vul01/1.md

related

https://github.com/feiwuxingxie/cve/blob/main/linksys/vul01/1.md#poc

exploit

https://www.linksys.com/

product

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.