Buffer Overflow Vulnerability in Linksys E1700 Router
CVE-2025-9525

8.7HIGH

Key Information:

Vendor

Linksys
Status
E1700
Vendor
CVE Published:
27 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9525?

A stack-based buffer overflow flaw has been identified in the Linksys E1700 router, specifically in the setWan function located in the /goform/setWan script. This vulnerability arises when the parameters DeviceName or lanIp are manipulated, allowing remote attackers to exploit the flaw. If successfully executed, an attacker could gain unauthorized access to the device, leading to potential network compromise. Despite early notification, Linksys has not addressed this security issue, making affected users particularly vulnerable to exploitation.

Affected Version(s)

E1700 1.0.0.4.003

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-2025-9525 - Proof of Concept

References

https://vuldb.com/?id.321542
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321542
signaturepermissions-required
https://vuldb.com/?submit.634824
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

Bond_yes (VulDB User)
.
CVE-2025-9525 : Buffer Overflow Vulnerability in Linksys E1700 Router