What is CVE-2020-35786?

CVE-2020-35786 is a medium-severity vulnerability in NETGEAR R7800, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.5/10. Published 2020-12-30.

How severe is CVE-2020-35786?

Medium severity. CVSS v3 base score is 4.5 out of 10.

Buffer overflow in NETGEAR R7800

CVE-2020-35786

NETGEAR R7800 devices before 1.0.2.74 are affected by a buffer overflow by an authenticated user.

Vulnerability class: Buffer Overflow

Published 2020-12-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (38.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.7% 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-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

kb.netgear.com/000062718/Security-Advisory-for-Post-Authentication-Buffer-Overf… (Vendor Advisory)

Frequently asked questions

What is CVE-2020-35786?: CVE-2020-35786 is a medium-severity vulnerability in NETGEAR R7800, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 4.5/10. Published 2020-12-30.
How severe is CVE-2020-35786?: Medium severity. CVSS v3 base score is 4.5 out of 10.