How severe is CVE-2021-28033?

CVE-2021-28033 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-2021-28033 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-2021-28033?

CVE-2021-28033 affects Byte Struct Project Byte Struct. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28033?

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-2021-28033 published?

CVE-2021-28033 was published on 2021-03-05 and last updated on 2026-06-17.

CVE-2021-28033

CVE-2021-28033 is a critical-severity vulnerability in Byte Struct Project Byte Struct 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: Byte Struct Project Byte Struct
Published: 2021-03-05
Last modified: 2026-06-17

Description

An issue was discovered in the byte_struct crate before 0.6.1 for Rust. There can be a drop of uninitialized memory if a certain deserialization method panics.

Frequently asked questions

What is CVE-2021-28033?: An issue was discovered in the byte_struct crate before 0.6.1 for Rust. There can be a drop of uninitialized memory if a certain deserialization method panics.
How severe is CVE-2021-28033?: CVE-2021-28033 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-2021-28033 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-2021-28033?: CVE-2021-28033 affects Byte Struct Project Byte Struct. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28033?: 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-2021-28033 published?: CVE-2021-28033 was published on 2021-03-05 and last updated on 2026-06-17.

References

https://rustsec.org/advisories/RUSTSEC-2021-0032.html

Affected products (1)

cpe:2.3:a:byte_struct_project:byte_struct:*:*:*:*:*:rust:*:*

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