Buffer Overflow Vulnerability in Tenda AC23 Router
CVE-2026-1420

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac23
Vendor
CVE Published:
26 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1420?

A buffer overflow vulnerability has been identified in the Tenda AC23 router, specifically affecting version 16.03.07.52. This vulnerability is associated with an unknown function within the /goform/WifiExtraSet file, where manipulation of the wpapsk_crypto argument can lead to a buffer overflow. Such exploitation could potentially allow remote attackers to execute arbitrary code. Given that the exploit has been published, affected users are strongly advised to review their security measures and apply necessary patches if available.

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Affected Version(s)

AC23 16.03.07.52

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-2026-1420 - Proof of Concept

CVE-2026-1420 - Proof of Concept

References

https://vuldb.com/?id.342836
vdb-entrytechnical-description
https://vuldb.com/?ctiid.342836
signaturepermissions-required
https://vuldb.com/?submit.736559
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

xuanyu (VulDB User)
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