What is CVE-2021-38517?

CVE-2021-38517 is a medium-severity vulnerability in NETGEAR R6400, classified under Out-of-bounds Read. CVSS score: 6.9/10. Published 2021-08-11.

How severe is CVE-2021-38517?

Medium severity. CVSS v3 base score is 6.9 out of 10.

Out-of-bounds Read in NETGEAR R6400

CVE-2021-38517

Certain NETGEAR devices are affected by out-of-bounds reads and writes. This affects R6400 before 1.0.1.70, RAX75 before 1.0.4.120, RAX80 before 1.0.4.120, and XR300 before 1.0.3.50.

Vulnerability class: Buffer Overflow

Published 2021-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.7th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

References

kb.netgear.com/000063772/Security-Advisory-for-Out-of-Bounds-Read-and-Write-on-… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-38517?: CVE-2021-38517 is a medium-severity vulnerability in NETGEAR R6400, classified under Out-of-bounds Read. CVSS score: 6.9/10. Published 2021-08-11.
How severe is CVE-2021-38517?: Medium severity. CVSS v3 base score is 6.9 out of 10.