How severe is CVE-2020-36512?

CVE-2020-36512 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-36512 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-36512?

CVE-2020-36512 affects Buffoon Project Buffoon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-36512?

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

When was CVE-2020-36512 published?

CVE-2020-36512 was published on 2021-12-27 and last updated on 2026-06-17.

CVE-2020-36512

CVE-2020-36512 is a critical-severity vulnerability in Buffoon Project Buffoon with a CVSS 3.x base score of 9.8. 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-908.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Buffoon Project Buffoon
Published: 2021-12-27
Last modified: 2026-06-17

Description

An issue was discovered in the buffoon crate through 2020-12-31 for Rust. InputStream::read_exact may read from uninitialized memory locations.

Frequently asked questions

What is CVE-2020-36512?: An issue was discovered in the buffoon crate through 2020-12-31 for Rust. InputStream::read_exact may read from uninitialized memory locations.
How severe is CVE-2020-36512?: CVE-2020-36512 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-36512 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36512?: CVE-2020-36512 affects Buffoon Project Buffoon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-36512?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-36512 published?: CVE-2020-36512 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:buffoon_project:buffoon:0.5.0:*:*:*:*:rust:*:*

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