What is CVE-2024-40503?

CVE-2024-40503 is a medium-severity vulnerability in Tenda Ax12, classified under Improper Verification of Source of a Communication Channel. CVSS score: 6.5/10. Published 2024-07-16.

How severe is CVE-2024-40503?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Tenda Ax12

CVE-2024-40503

An issue in Tenda AX12 v.16.03.49.18_cn+ allows a remote attacker to cause a denial of service via the Routing functionality and ICMP packet handling.

Published 2024-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (32.2th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Tenda Ax12
Tenda Ax12 Firmware — versions 16.03.49.18_cn

Weakness classification (CWE)

CWE-940 — Improper Verification of Source of a Communication Channel

References

gist.github.com/Mivik/8927ad100a638756e1fe214dd5fca5f9 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2024-40503?: CVE-2024-40503 is a medium-severity vulnerability in Tenda Ax12, classified under Improper Verification of Source of a Communication Channel. CVSS score: 6.5/10. Published 2024-07-16.
How severe is CVE-2024-40503?: Medium severity. CVSS v3 base score is 6.5 out of 10.