Buffer Overflow Vulnerability in Totolink Router Software
CVE-2026-1157

8.7HIGH

Key Information:

Vendor

Totolink
Status
Lr350
Vendor
CVE Published:
19 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1157?

A vulnerability in the Totolink LR350 router version 9.3.5u.6369_B20220309 has been discovered, specifically within the setWiFiEasyCfg function of the /cgi-bin/cstecgi.cgi file. This flaw allows an attacker to manipulate the 'ssid' argument, resulting in a buffer overflow condition. The exploit can be executed remotely, making this vulnerability particularly concerning. Publicly available exploit techniques increase the risk of compromise, underlining the need for immediate remediation.

Affected Version(s)

LR350 9.3.5u.6369_B20220309

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-2026-1157 - Proof of Concept

References

https://vuldb.com/?id.341751
vdb-entrytechnical-description
https://vuldb.com/?ctiid.341751
signaturepermissions-required
https://vuldb.com/?submit.735726
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

yhryhryhr_miemie (VulDB User)
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