What is CVE-2020-8962?

CVE-2020-8962 is a critical-severity vulnerability in Dlink Dir-842, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-02-13.

How severe is CVE-2020-8962?

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

Buffer overflow in Dlink Dir-842

CVE-2020-8962

A stack-based buffer overflow was found on the D-Link DIR-842 REVC with firmware v3.13B09 HOTFIX due to the use of strcpy for LOGINPASSWORD when handling a POST request to the /MTFWU endpoint.

Vulnerability class: Buffer Overflow

Published 2020-02-13 · 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: 0.018 (77.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Dlink Dir-842 — versions c
Dlink Dir-842 Firmware — versions 3.13b09

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

ctrsec.io/index.php/2020/02/12/cve-2020-8962-d-link-dir-842-stack-based-buffer-… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8962?: CVE-2020-8962 is a critical-severity vulnerability in Dlink Dir-842, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-02-13.
How severe is CVE-2020-8962?: Critical severity. CVSS v3 base score is 9.8 out of 10.