How severe is CVE-2021-45683?

CVE-2021-45683 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-2021-45683 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-2021-45683?

CVE-2021-45683 affects Binjs Io Project Binjs Io. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45683?

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-2021-45683 published?

CVE-2021-45683 was published on 2021-12-27 and last updated on 2026-06-17.

CVE-2021-45683

CVE-2021-45683 is a critical-severity vulnerability in Binjs Io Project Binjs Io 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: Binjs Io Project Binjs Io
Published: 2021-12-27
Last modified: 2026-06-17

Description

An issue was discovered in the binjs_io crate through 2021-01-03 for Rust. The Read method may read from uninitialized memory locations.

Frequently asked questions

What is CVE-2021-45683?: An issue was discovered in the binjs_io crate through 2021-01-03 for Rust. The Read method may read from uninitialized memory locations.
How severe is CVE-2021-45683?: CVE-2021-45683 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-2021-45683 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-2021-45683?: CVE-2021-45683 affects Binjs Io Project Binjs Io. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45683?: 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-2021-45683 published?: CVE-2021-45683 was published on 2021-12-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:binjs_io_project:binjs_io:0.2.1:*:*:*:*:rust:*:*

Other CWE-908 (Use of Uninitialized Resource) vulnerabilities

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CVE-2023-24941 — Critical (CVSS 9.8): Windows Network File System Remote Code Execution Vulnerability
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CVE-2021-45703 — Critical (CVSS 9.8): An issue was discovered in the tectonic_xdv crate before 0.1.12 for Rust. XdvParser::<T>::process may read from…

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