What’s Vulnerable › Vulnerabilities

CVE-2026-4254: Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-119

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: through 16.03.50.11

References

• https://github.com/digitalandrew/tenda_ac8_v5/blob/main/CVE_Report_Tenda_AC8_SysToolChangePwd_BOF.md
• https://vuldb.com/?ctiid.351212
• https://vuldb.com/?id.351212
• https://vuldb.com/?submit.771773
• https://www.tenda.com.cn/

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