How severe is CVE-2023-40394?

CVE-2023-40394 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-40394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40394?

CVE-2023-40394 primarily affects Apple Ipados. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-40394 have an EU (EUVD) identifier?

Yes. CVE-2023-40394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44965.

When was CVE-2023-40394 published?

CVE-2023-40394 was published on 2024-01-10 and last updated on 2026-06-17.

CVE-2023-40394

CVE-2023-40394 is a low-severity vulnerability in Apple Ipados with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44965
Weakness: CWE-20
Affected product: Apple Ipados
Published: 2024-01-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-40394?: CVE-2023-40394 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-40394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40394?: CVE-2023-40394 primarily affects Apple Ipados. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-40394 have an EU (EUVD) identifier?: Yes. CVE-2023-40394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44965.
When was CVE-2023-40394 published?: CVE-2023-40394 was published on 2024-01-10 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/HT213841

Affected products (2)

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

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