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CVE-2021-28033

29
FAUCET Score

CVE-2021-28033 describes a critical vulnerability in the Rust byte_struct crate prior to version 0.6.1, where a deserialization method panic can lead to the dropping of uninitialized memory. With a CVSS score of 9.8, this vulnerability presents a critical risk, allowing for complete compromise of confidentiality, integrity, and availability with low attack complexity and no user interaction required. Despite its severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.6.1CPE matchmatch criteria
cpe:2.3:a:byte_struct_project:byte_struct:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 50th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: byte_structFixed in: 0.6.1

Vendor Advisories (1)

rustGHSA-8fgg-5v78-6g76critical

Deserializing an array can free uninitialized memory in byte_struct

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2021-0032.html
PatchThird Party Advisory