CVE-2025-6752

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

State: Published
Severity: 8.7 High
Published: Jun 27, 2025
Updated: Jun 27, 2025
Reserved: Jun 26, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P	VulDB
3.1	8.8 High	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	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
WRT1900ACSLinksys	20250619Affected
EA7200Linksys	20250619Affected
EA7450Linksys	20250619Affected
EA7500Linksys	20250619Affected

References

VDB-314050 | Linksys WRT1900ACS/EA7200/EA7450/EA7500 IGD Layer3Forwarding SetDefaultConnectionService stack-based overflowvdb-entrytechnical-description
VDB-314050 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #600638 | Linksys WRT1900ACS Ver. 2.0.3.201002 Stack-based Buffer Overflowthird-party-advisory
https://github.com/feiwuxingxie/cve/blob/main/linksys/vul01/1.mdrelated
https://github.com/feiwuxingxie/cve/blob/main/linksys/vul01/1.md#pocexploit
https://www.linksys.com/product

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