What is CVE-2020-11209?

CVE-2020-11209 is a medium-severity vulnerability in Qualcomm Qcs603, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2020-11-12.

How severe is CVE-2020-11209?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Auth bypass in Qualcomm Qcs603

CVE-2020-11209

Improper authorization in DSP process could allow unauthorized users to downgrade the library versions in SD820, SD821, SD820, QCS603, QCS605, SDA855, SA6155P, SA6145P, SA6155, SA6155P, SD855, SD 675, SD660, SD429, SD439

Vulnerability class: Broken Access Control

Published 2020-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

www.qualcomm.com/company/product-security/bulletins/november-2020-bulletin (Broken Link, Vendor Advisory)
blog.checkpoint.com/2020/08/06/achilles-small-chip-big-peril/ (Third Party Advisory)
research.checkpoint.com/2021/pwn2own-qualcomm-dsp/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-11209?: CVE-2020-11209 is a medium-severity vulnerability in Qualcomm Qcs603, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2020-11-12.
How severe is CVE-2020-11209?: Medium severity. CVSS v3 base score is 5.5 out of 10.