What is CVE-2017-18865?

CVE-2017-18865 is a medium-severity vulnerability in NETGEAR R8300, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2020-05-05.

How severe is CVE-2017-18865?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Buffer overflow in NETGEAR R8300

CVE-2017-18865

Certain NETGEAR devices are affected by a stack-based buffer overflow by an authenticated user. This affects R8300 before 1.0.2.104 and R8500 before 1.0.2.104.

Vulnerability class: Buffer Overflow

Published 2020-05-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

kb.netgear.com/000051485/Security-Advisory-for-Post-Authentication-Stack-Overfl… (Vendor Advisory)

Frequently asked questions

What is CVE-2017-18865?: CVE-2017-18865 is a medium-severity vulnerability in NETGEAR R8300, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2020-05-05.
How severe is CVE-2017-18865?: Medium severity. CVSS v3 base score is 6.8 out of 10.