What is CVE-2021-28033?

CVE-2021-28033 is a critical-severity vulnerability in Byte Struct Project, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2021-03-05.

How severe is CVE-2021-28033?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Byte Struct Project

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.

Published 2021-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.001

Affected products

Byte Struct Project

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

rustsec.org/advisories/RUSTSEC-2021-0032.html (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28033?: CVE-2021-28033 is a critical-severity vulnerability in Byte Struct Project, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2021-03-05.
How severe is CVE-2021-28033?: Critical severity. CVSS v3 base score is 9.8 out of 10.