What is CVE-2026-4042?

CVE-2026-4042 is a high-severity vulnerability in Tenda I12, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-12.

How severe is CVE-2026-4042?

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

Buffer overflow in Tenda I12

CVE-2026-4042

A weakness has been identified in Tenda i12 1.0.0.6(2204). The affected element is the function formWifiMacFilterGet of the file /goform/WifiMacFilterGet. This manipulation of the argument index causes stack-based buffer overflow. The atta…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (28.3th 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/E:P/RL:X/RC:R.

Affected products

Tenda I12 — versions 1.0.0.6(2204)

Weakness classification (CWE)

References

VDB-350654 | Tenda i12 WifiMacFilterGet formWifiMacFilterGet stack-based overflow (vdb-entry, technical-description)
VDB-350654 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #769463 | Tenda i12 V1.0.0.6(2204) Buffer Overflow (third-party-advisory)
github.com/Jimi-Lab/cve/issues/2 (exploit, issue-tracking)
www.tenda.com.cn/ (product)

Frequently asked questions

What is CVE-2026-4042?: CVE-2026-4042 is a high-severity vulnerability in Tenda I12, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-12.
How severe is CVE-2026-4042?: High severity. CVSS v3 base score is 8.8 out of 10.