What is CVE-2020-10827?

CVE-2020-10827 is a critical-severity vulnerability in Draytek Vigor2960, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-03-26.

How severe is CVE-2020-10827?

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

Buffer overflow in Draytek Vigor2960

CVE-2020-10827

A stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request.

Vulnerability class: Buffer Overflow

Published 2020-03-26 · 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: 0.209 (97.5th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.209 · newest: 0.209 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

slashd.ga/2020/03/draytek-vulnerabilities/ (Exploit, Third Party Advisory)
www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack…

Frequently asked questions

What is CVE-2020-10827?: CVE-2020-10827 is a critical-severity vulnerability in Draytek Vigor2960, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-03-26.
How severe is CVE-2020-10827?: Critical severity. CVSS v3 base score is 9.8 out of 10.