What is CVE-2025-3820?

CVE-2025-3820 is a high-severity vulnerability in Tenda I24, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-04-19.

How severe is CVE-2025-3820?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Tenda I24

CVE-2025-3820

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 lea…

Vulnerability class: Buffer Overflow

EPSS: 0.049 (89.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Tenda I24 — versions 3.0.0.4(2887), 3.0.0.5(3644)
Tenda W12 — versions 3.0.0.4(2887), 3.0.0.5(3644)

Weakness classification (CWE)

References

VDB-305726 | Tenda W12/i24 httpd cgiSysUplinkCheckSet stack-based overflow (vdb-entry, technical-description)
VDB-305726 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #555728 | Tenda w12,i24 w12 V3.0.0.5(3644) and i24 V3.0.0.4(2887) Stack-based Buffer Overflow (third-party-advisory)
github.com/02Tn/vul/issues/4 (exploit, issue-tracking)
www.tenda.com.cn/ (product)

Frequently asked questions

What is CVE-2025-3820?: CVE-2025-3820 is a high-severity vulnerability in Tenda I24, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-04-19.
How severe is CVE-2025-3820?: High severity. CVSS v3 base score is 8.8 out of 10.