Buffer Overflow Vulnerability in Totolink A3600R Product
CVE-2026-1686

8.7HIGH

Key Information:

Vendor

Totolink
Status
A3600r
Vendor
CVE Published:
30 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1686?

A security flaw has been identified in the Totolink A3600R router, specifically within the function setAppEasyWizardConfig in the app.so library. This vulnerability arises from a buffer overflow triggered by the manipulation of the apcliSsid argument. Attackers can exploit this issue remotely, potentially allowing unauthorized access and control over the affected device. The exploit details have been publicly disclosed, raising concerns among users about the potential for targeted attacks.

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Affected Version(s)

A3600R 5.9c.4959

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-2026-1686 - Proof of Concept

References

https://vuldb.com/?id.343480
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343480
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https://vuldb.com/?submit.740888
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

Abcd1234 (VulDB User)
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