What is CVE-2020-14124?

CVE-2020-14124 is a critical-severity vulnerability in Mi Ax3600, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-09-16.

How severe is CVE-2020-14124?

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

Is CVE-2020-14124 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Mi Ax3600

CVE-2020-14124

There is a buffer overflow in librsa.so called by getwifipwdurl interface, resulting in code execution on Xiaomi router AX3600 with ROM version =rom< 1.1.12.

Vulnerability class: Buffer Overflow

Published 2021-09-16 · 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: 0.018 (77.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.018 · change: -0.002

Affected products

Mi Ax3600
Mi Ax3600 Firmware
Xiaomi Router Ax3600 — versions Xiaomi Router AX3600 rom rom< 1.1.12

Weakness classification (CWE)

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

Public proof-of-concept exploits

p1ay8y3ar/cve_

References

trust.mi.com/zh-CN/misrc/bulletins/advisory (Vendor Advisory)

Frequently asked questions

What is CVE-2020-14124?: CVE-2020-14124 is a critical-severity vulnerability in Mi Ax3600, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-09-16.
How severe is CVE-2020-14124?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-14124 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.