What is CVE-2023-27217?

CVE-2023-27217 is a critical-severity vulnerability in Belkin F7c063, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-05-18.

How severe is CVE-2023-27217?

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

Buffer overflow in Belkin F7c063

CVE-2023-27217

A stack-based buffer overflow in the ChangeFriendlyName() function of Belkin Smart Outlet V2 F7c063 firmware_2.00.11420.OWRT.PVT_SNSV2 allows attackers to cause a Denial of Service (DoS) via a crafted UPNP request.

Vulnerability class: Buffer Overflow

Published 2023-05-18 · 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: 0.010 (60.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Belkin F7c063
Belkin F7c063 Firmware — versions 2.00.11420.owrt.pvt_snsv2

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

sternumiot.com/iot-blog/mini-smart-plug-v2-vulnerability-buffer-overflow/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-27217?: CVE-2023-27217 is a critical-severity vulnerability in Belkin F7c063, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-05-18.
How severe is CVE-2023-27217?: Critical severity. CVSS v3 base score is 9.8 out of 10.