What is CVE-2023-40394?

CVE-2023-40394 is a low-severity vulnerability in Apple iOS And Ipados, classified under Improper Input Validation. CVSS score: 3.3/10. Published 2024-01-10.

How severe is CVE-2023-40394?

Low severity. CVSS v3 base score is 3.3 out of 10.

Improper input validation in Apple iOS And Ipados

CVE-2023-40394

The issue was addressed with improved validation of environment variables. This issue is fixed in iOS 16.6 and iPadOS 16.6. An app may be able to access sensitive user data.

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

Published 2024-01-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.2% 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

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/en-us/HT213841 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2023-40394?: CVE-2023-40394 is a low-severity vulnerability in Apple iOS And Ipados, classified under Improper Input Validation. CVSS score: 3.3/10. Published 2024-01-10.
How severe is CVE-2023-40394?: Low severity. CVSS v3 base score is 3.3 out of 10.