Buffer Overflow in Tenda AC23 Router
CVE-2026-0640

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac23
Vendor
CVE Published:
6 January 2026

What is CVE-2026-0640?

A vulnerability has been discovered in the Tenda AC23 Router, specifically in the sscanf function within the /goform/PowerSaveSet file. This weakness allows an attacker to manipulate the 'Time' argument, leading to a buffer overflow condition. The attack can be executed remotely, posing a significant risk as the exploit is publicly accessible. Users of the affected version should take immediate precautions to secure their devices.

Affected Version(s)

AC23 16.03.07.52

References

https://vuldb.com/?id.339683
vdb-entrytechnical-description
https://vuldb.com/?ctiid.339683
signaturepermissions-required
https://vuldb.com/?submit.731772
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

  • Vulnerability published

  • Vulnerability Reserved

Credit

xuanyu (VulDB User)
.