What is CVE-2025-55847?

CVE-2025-55847 is a high-severity vulnerability in Wavlink Wl-Wn586x3a, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-09-26.

How severe is CVE-2025-55847?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2025-55847 known to be exploited?

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

Buffer overflow in Wavlink Wl-Wn586x3a

CVE-2025-55847

Wavlink M86X3A_V240730 contains a buffer overflow vulnerability in the /cgi-bin/ExportAllSettings.cgi file. The vulnerability arises because the Cookie parameter does not properly validate the length of input data. Attackers can exploit this to execute arbitrary code or cause a denial of service (DoS) on the system

Vulnerability class: Buffer Overflow

EPSS: 0.019 (77.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wavlink Wl-wn586x3a
Wavlink Wl-wn586x3a_firmware — versions m86x3a_v240730
N/a — versions n/a

Weakness classification (CWE)

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

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

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

Frequently asked questions

What is CVE-2025-55847?: CVE-2025-55847 is a high-severity vulnerability in Wavlink Wl-Wn586x3a, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2025-09-26.
How severe is CVE-2025-55847?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-55847 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.