What is CVE-2025-64053?

CVE-2025-64053 is a high-severity vulnerability in Fanvil X210, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2025-12-05.

How severe is CVE-2025-64053?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Fanvil X210

CVE-2025-64053

A Buffer overflow vulnerability on Fanvil x210 2.12.20 devices allows attackers to cause a denial of service or potentially execute arbitrary commands via crafted POST request to the /cgi-bin/webconfig?page=upload&action=submit endpoint.

Vulnerability class: Buffer Overflow

Published 2025-12-05 · last modified 2026-09-25.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.029 (86.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000

Affected products

Fanvil X210 — versions 2.0
Fanvil X210 Firmware — versions 2.12.20

Weakness classification (CWE)

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

References

fanvil.com (Product)
github.com/SpikeReply/advisories/blob/main/cve/fanvil/cve-2025-64053.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-64053?: CVE-2025-64053 is a high-severity vulnerability in Fanvil X210, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2025-12-05.
How severe is CVE-2025-64053?: High severity. CVSS v3 base score is 7.5 out of 10.