How severe is CVE-2020-35880?

CVE-2020-35880 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-2020-35880 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35880?

CVE-2020-35880 affects Bigint Project Bigint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35880?

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-2020-35880 published?

CVE-2020-35880 was published on 2020-12-31 and last updated on 2026-06-17.

CVE-2020-35880

CVE-2020-35880 is a critical-severity vulnerability in Bigint Project Bigint 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Bigint Project Bigint
Published: 2020-12-31
Last modified: 2026-06-17

Description

An issue was discovered in the bigint crate through 2020-05-07 for Rust. It allows a soundness violation.

Frequently asked questions

What is CVE-2020-35880?: An issue was discovered in the bigint crate through 2020-05-07 for Rust. It allows a soundness violation.
How severe is CVE-2020-35880?: CVE-2020-35880 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-2020-35880 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35880?: CVE-2020-35880 affects Bigint Project Bigint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35880?: 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-2020-35880 published?: CVE-2020-35880 was published on 2020-12-31 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2020-0025.html

Affected products (1)

cpe:2.3:a:bigint_project:bigint:*:*:*:*:*:rust:*:*