Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-45692

30
FAUCET Score

CVE-2021-45692 is a critical vulnerability affecting the messagepack-rs crate for Rust, where the deserialize_extension_others function can read from uninitialized memory. With a CVSS score of 9.8, this network-exploitable flaw allows for high impact to confidentiality, integrity, and availability without user interaction. Despite its severity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.8.1CPE matchmatch criteria
cpe:2.3:a:messagepack-rs_project:messagepack-rs:*:*:*:*:*: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
1.37%
Probability of exploitation in next 30 days
EPSS Percentile
69.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0137 is in the 56th percentile among its peer group of 36,821 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-hr52-f9vp-582ccritical

Use of Uninitialized Resource in messagepack-rs.

Jan 6, 2022

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/messagepack-rs/RUSTSEC-2021-0092.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2021-0092.html
Third Party Advisory