What is CVE-2023-43551?

CVE-2023-43551 is a critical-severity vulnerability in Qualcomm 205 Mobile, classified under Improper Authentication. CVSS score: 9.1/10. Published 2024-06-03.

How severe is CVE-2023-43551?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Qualcomm 205 Mobile

CVE-2023-43551

Cryptographic issue while performing attach with a LTE network, a rogue base station can skip the authentication phase and immediately send the Security Mode Command.

Vulnerability class: Broken Authentication

Published 2024-06-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (15.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

docs.qualcomm.com/product/publicresources/securitybulletin/june-2024-bulletin.h… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-43551?: CVE-2023-43551 is a critical-severity vulnerability in Qualcomm 205 Mobile, classified under Improper Authentication. CVSS score: 9.1/10. Published 2024-06-03.
How severe is CVE-2023-43551?: Critical severity. CVSS v3 base score is 9.1 out of 10.