What is CVE-2021-38526?

CVE-2021-38526 is a medium-severity vulnerability in NETGEAR Rax35, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.3/10. Published 2021-08-11.

How severe is CVE-2021-38526?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Buffer overflow in NETGEAR Rax35

CVE-2021-38526

Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. This affects RAX35 before 1.0.3.94, RAX38 before 1.0.3.94, and RAX40 before 1.0.3.94.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (62.0th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.0% 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

Weakness classification (CWE)

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

References

kb.netgear.com/000063782/Security-Advisory-for-Pre-Authentication-Buffer-Overfl… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-38526?: CVE-2021-38526 is a medium-severity vulnerability in NETGEAR Rax35, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.3/10. Published 2021-08-11.
How severe is CVE-2021-38526?: Medium severity. CVSS v3 base score is 4.3 out of 10.