# CVE-2026-4254

## Summary

- **CVE ID:** CVE-2026-4254
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P)
- **CWE:** CWE-121, CWE-119
- **Published:** Mar 16, 2026
- **Last Modified:** Mar 16, 2026

## Description

A weakness has been identified in Tenda AC8 up to 16.03.50.11. This vulnerability affects the function doSystemCmd of the file /goform/SysToolChangePwd of the component HTTP Endpoint. This manipulation of the argument local_2c causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

## Affected Products

- Tenda — AC8 (16.03.50.0)
- Tenda — AC8 (16.03.50.1)
- Tenda — AC8 (16.03.50.2)
- Tenda — AC8 (16.03.50.3)
- Tenda — AC8 (16.03.50.4)
- Tenda — AC8 (16.03.50.5)
- Tenda — AC8 (16.03.50.6)
- Tenda — AC8 (16.03.50.7)
- Tenda — AC8 (16.03.50.8)
- Tenda — AC8 (16.03.50.9)
- Tenda — AC8 (16.03.50.10)
- Tenda — AC8 (16.03.50.11)

## References

- [CNA](https://vuldb.com/?id.351212)
- [CNA](https://vuldb.com/?ctiid.351212)
- [CNA](https://vuldb.com/?submit.771773)
- [CNA](https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md)
- [CNA](https://www.tenda.com.cn/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.89%
- **EPSS Percentile:** 57.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._