How severe is CVE-2020-4068?

CVE-2020-4068 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2020-4068 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-4068?

CVE-2020-4068 affects Apnswift Project Apnswift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-4068?

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

When was CVE-2020-4068 published?

CVE-2020-4068 was published on 2020-06-22 and last updated on 2026-06-17.

CVE-2020-4068

CVE-2020-4068 is a medium-severity vulnerability in Apnswift Project Apnswift with a CVSS 3.x base score of 6.3. 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-122.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Apnswift Project Apnswift
Published: 2020-06-22
Last modified: 2026-06-17

Description

In APNSwift 1.0.0, calling APNSwiftSigner.sign(digest:) is likely to result in a heap buffer overflow. This has been fixed in 1.0.1.

Frequently asked questions

What is CVE-2020-4068?: In APNSwift 1.0.0, calling APNSwiftSigner.sign(digest:) is likely to result in a heap buffer overflow. This has been fixed in 1.0.1.
How severe is CVE-2020-4068?: CVE-2020-4068 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2020-4068 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-4068?: CVE-2020-4068 affects Apnswift Project Apnswift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-4068?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4068 published?: CVE-2020-4068 was published on 2020-06-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apnswift_project:apnswift:1.0.0:*:*:*:*:*:*:*

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