CVE-2025-3820: Tenda W12/i24 httpd cgiSysUplinkCheckSet stack-based overflow

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 12.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-04-19 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644) and classified as critical. Affected by this issue is the function cgiSysUplinkCheckSet of the file /bin/httpd. The manipulation of the argument hostIp1/hostIp2 leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Affected products

Tenda I24 Firmware: 3.0.0.4(2887), 3.0.0.5(3644)
Tenda W12: 3.0.0.4(2887), 3.0.0.5(3644)

References

https://github.com/02Tn/vul/issues/4
https://vuldb.com/?ctiid.305726
https://vuldb.com/?id.305726
https://vuldb.com/?submit.555728
https://www.tenda.com.cn/

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