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CVE-2021-28036

23
FAUCET Score

CVE-2021-28036 is a high-severity vulnerability affecting the Rust quinn crate before version 0.7.0, stemming from invalid memory access due to direct casting of standard library socket address structures. This network-exploitable flaw has low attack complexity and could lead to high confidentiality impact, though integrity and availability are not affected. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.5.4CPE matchmatch criteria
cpe:2.3:a:quinn_project:quinn:*:*:*:*:*:rust:*:*
>= 0.6.0, < 0.6.2CPE matchmatch criteria
cpe:2.3:a:quinn_project:quinn:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 46th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rustpatch availablevia ghsa
Product: quinnFixed in: 0.5.4
rustpatch availablevia ghsa
Product: quinnFixed in: 0.6.2

Vendor Advisories (1)

rustGHSA-fhv4-fx3v-77w6high

quinn invalidly assumes the memory layout of std::net::SocketAddr

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2021-0035.html
PatchThird Party Advisory