What is CVE-2026-24109?

CVE-2026-24109 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-2026-24109?

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

Buffer overflow in Tenda W20e

CVE-2026-24109

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by controlling the value of `picName`. When this value is used in `sprintf` without validating variable sizes, it could lead to a buffer overf…

Vulnerability class: Buffer Overflow

EPSS: 0.006 (47.3th percentile) — read the EPSS interpretation.

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.

Affected products

Tenda W20e — versions 4.0
Tenda W20e_firmware — versions 15.11.0.6
N/a — versions n/a

Weakness classification (CWE)

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

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-24109?: CVE-2026-24109 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-2026-24109?: Critical severity. CVSS v3 base score is 9.8 out of 10.