CVE-2026-0640

Name: CVE-2026-0640
Creator: NVD / NIST
Published: 2026-01-06T16:15:57.293+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 2.99%

Last modified Jun 17, 2026

CVE-2026-0640 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. EPSS estimates a 2.99% chance of exploitation in the next 30 days.

Description

A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. Executing a manipulation of the argument Time can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

2.99%

85.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Tenda	Ac23 Firmware	16.03.07.52

References

https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.mdExploit, Third Party Advisory
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.md#pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.339683Permissions Required, VDB Entry
https://vuldb.com/?id.339683Third Party Advisory, VDB Entry
https://vuldb.com/?submit.731772Third Party Advisory, VDB Entry
https://www.tenda.com.cn/Product

Timeline

Published: Jan 6, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-0640?

How severe is CVE-2026-0640?

CVE-2026-0640 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 2.99% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0640?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-0640?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST