Stack-based Buffer Overflow in Linksys Routers
CVE-2025-6752

8.7HIGH

Key Information:

Vendor

Linksys
Status
Wrt1900acs
Ea7200
Ea7450
Ea7500
Vendor
CVE Published:
27 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6752?

A critical vulnerability has been identified in multiple Linksys router models, primarily affecting the function SetDefaultConnectionService within the '/upnp/control/Layer3Forwarding' component. This flaw allows a remote attacker to exploit the argument NewDefaultConnectionService resulting in a stack-based buffer overflow. Given that the exploit has been publicly disclosed, there is an urgent need for affected users to prioritize security measures.

Affected Version(s)

EA7200 20250619

EA7450 20250619

EA7500 20250619

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6752 - Proof of Concept

References

https://vuldb.com/?id.314050
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314050
signaturepermissions-required
https://vuldb.com/?submit.600638
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

starash (VulDB User)
.
CVE-2025-6752 : Stack-based Buffer Overflow in Linksys Routers