What is CVE-2020-11307?

CVE-2020-11307 is a critical-severity vulnerability in Qualcomm Apq8009w, classified under Improper Validation of Array Index. CVSS score: 9.8/10. Published 2021-07-13.

How severe is CVE-2020-11307?

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

Vulnerability in Qualcomm Apq8009w

CVE-2020-11307

Buffer overflow in modem due to improper array index check before copying into it in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Wearables

Published 2021-07-13 · 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: 0.009 (59.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

www.qualcomm.com/company/product-security/bulletins/july-2021-bulletin (Vendor Advisory)

Frequently asked questions

What is CVE-2020-11307?: CVE-2020-11307 is a critical-severity vulnerability in Qualcomm Apq8009w, classified under Improper Validation of Array Index. CVSS score: 9.8/10. Published 2021-07-13.
How severe is CVE-2020-11307?: Critical severity. CVSS v3 base score is 9.8 out of 10.