What is CVE-2020-12789?

CVE-2020-12789 is a high-severity vulnerability in Microchip Atsama5d21c-Cu, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2020-09-14.

How severe is CVE-2020-12789?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-12789 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Microchip Atsama5d21c-Cu

CVE-2020-12789

The Secure Monitor in Microchip Atmel ATSAMA5 products use a hardcoded key to encrypt and authenticate secure applets.

Published 2020-09-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

Public proof-of-concept exploits

References

labs.f-secure.com/advisories/microchip-atsama5-soc-multiple-vulnerabilities/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-12789?: CVE-2020-12789 is a high-severity vulnerability in Microchip Atsama5d21c-Cu, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2020-09-14.
How severe is CVE-2020-12789?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-12789 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.