What is CVE-2021-1966?

CVE-2021-1966 is a medium-severity vulnerability in Qualcomm Aqt1000, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2021-10-20.

How severe is CVE-2021-1966?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Qualcomm Aqt1000

CVE-2021-1966

Possible buffer overflow due to lack of length check of source and destination buffer before copying in Snapdragon Auto, Snapdragon Compute, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music

Vulnerability class: Buffer Overflow

Published 2021-10-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (3.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

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

Frequently asked questions

What is CVE-2021-1966?: CVE-2021-1966 is a medium-severity vulnerability in Qualcomm Aqt1000, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.7/10. Published 2021-10-20.
How severe is CVE-2021-1966?: Medium severity. CVSS v3 base score is 6.7 out of 10.