What is CVE-2026-24114?

CVE-2026-24114 is a critical-severity vulnerability in Tenda W20e, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-03-02.

How severe is CVE-2026-24114?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tenda W20e

CVE-2026-24114

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate `pPortMapIndex` may lead to buffer overflows when using `strcpy`.

Vulnerability class: Buffer Overflow

Published 2026-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (50.5th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Tenda W20e — versions 4.0
Tenda W20e Firmware — versions 15.11.0.6

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.tenda.com.cn/material/show/2707 (Product)
github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24114 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-24114?: CVE-2026-24114 is a critical-severity vulnerability in Tenda W20e, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-03-02.
How severe is CVE-2026-24114?: Critical severity. CVSS v3 base score is 9.8 out of 10.