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CVE-2021-45683

29
FAUCET Score

CVE-2021-45683 is a critical vulnerability affecting the binjs_io crate for Rust, specifically versions through 2021-01-03. The flaw, categorized as CWE-908 (Use of Uninitialized Value), allows the Read method to access uninitialized memory locations. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without authentication (AV:N/AC:L/PR:N/UI:N) and can lead to complete compromise of confidentiality, integrity, and availability (C:H/I:H/A:H). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.2.1CPE matchmatch criteria
cpe:2.3:a:binjs_io_project:binjs_io:0.2.1:*:*:*:*: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
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 51st percentile among its peer group of 36,862 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

Vendor Advisories (1)

rustGHSA-cw4j-cf6c-mmfvcritical

Use of Uninitialized Resource in binjs_io.

Jan 6, 2022

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/binjs_io/RUSTSEC-2021-0085.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2021-0085.html
Third Party Advisory