How severe is CVE-2020-36444?

CVE-2020-36444 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-36444 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36444?

CVE-2020-36444 affects Async-coap Project Async-coap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36444?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-36444 published?

CVE-2020-36444 was published on 2021-08-08 and last updated on 2026-06-17.

CVE-2020-36444

CVE-2020-36444 is a high-severity vulnerability in Async-coap Project Async-coap with a CVSS 3.x base score of 8.1. 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-362.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Async-coap Project Async-coap
Published: 2021-08-08
Last modified: 2026-06-17

Description

An issue was discovered in the async-coap crate through 2020-12-08 for Rust. Send and Sync are implemented for ArcGuard<RC, T> without trait bounds on RC.

Frequently asked questions

What is CVE-2020-36444?: An issue was discovered in the async-coap crate through 2020-12-08 for Rust. Send and Sync are implemented for ArcGuard<RC, T> without trait bounds on RC.
How severe is CVE-2020-36444?: CVE-2020-36444 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-36444 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36444?: CVE-2020-36444 affects Async-coap Project Async-coap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36444?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-36444 published?: CVE-2020-36444 was published on 2021-08-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:async-coap_project:async-coap:*:*:*:*:*:rust:*:*

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