What is CVE-2023-21631?

CVE-2023-21631 is a high-severity vulnerability in Qualcomm 205, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2023-07-04.

How severe is CVE-2023-21631?

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

Improper input validation in Qualcomm 205

CVE-2023-21631

Weak Configuration due to improper input validation in Modem while processing LTE security mode command message received from network.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2023-07-04 · 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:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.qualcomm.com/company/product-security/bulletins/july-2023-bulletin (Vendor Advisory)

Frequently asked questions

What is CVE-2023-21631?: CVE-2023-21631 is a high-severity vulnerability in Qualcomm 205, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2023-07-04.
How severe is CVE-2023-21631?: High severity. CVSS v3 base score is 7.5 out of 10.