What is CVE-2020-15490?

CVE-2020-15490 is a critical-severity vulnerability in Wavlink Wl-Wn530hg4, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-07-01.

How severe is CVE-2020-15490?

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

Buffer overflow in Wavlink Wl-Wn530hg4

CVE-2020-15490

An issue was discovered on Wavlink WL-WN530HG4 M30HG4.V5030.191116 devices. Multiple buffer overflow vulnerabilities exist in CGI scripts, leading to remote code execution with root privileges. (The set of affected scripts is similar to CVE-2020-12266.)

Vulnerability class: Buffer Overflow

Published 2020-07-01 · 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: 0.037 (89.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Wavlink Wl-Wn530hg4
Wavlink Wl-Wn530hg4 Firmware — versions m30hg4.v5030.191116

Weakness classification (CWE)

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

References

gitlab.com/drakylar1/drakylar-cve-list/-/blob/master/Wavlink/CVE-2020-15490_mul… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-15490?: CVE-2020-15490 is a critical-severity vulnerability in Wavlink Wl-Wn530hg4, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-07-01.
How severe is CVE-2020-15490?: Critical severity. CVSS v3 base score is 9.8 out of 10.