What is CVE-2020-3681?

CVE-2020-3681 is a critical-severity vulnerability in Qualcomm -, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 9.8/10. Published 2020-07-31.

How severe is CVE-2020-3681?

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

Vulnerability in Qualcomm -

CVE-2020-3681

Authenticated and encrypted payload MMEs can be forged and remotely sent to any HPAV2 system using a jailbreak key recoverable from code.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2020-07-31 · 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: 0.007 (53.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

www.qualcomm.com/company/product-security/bulletins/july-2020-bulletin (Broken Link)
www.qualcomm.com/company/product-security/bulletins/july-2020-security-bulletin (Third Party Advisory)

Frequently asked questions

What is CVE-2020-3681?: CVE-2020-3681 is a critical-severity vulnerability in Qualcomm -, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 9.8/10. Published 2020-07-31.
How severe is CVE-2020-3681?: Critical severity. CVSS v3 base score is 9.8 out of 10.