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CVE-2021-45695

31
FAUCET Score

CVE-2021-45695 is a critical vulnerability affecting the mopa Rust crate, specifically versions through 2021-06-01. It stems from an incorrect reliance on Trait memory layout, which could lead to arbitrary code execution or ASLR bypass. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction or complex attack conditions, and potentially resulting in complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.2.2CPE matchmatch criteria
cpe:2.3:a:mopa_project:mopa:*:*:*:*:*: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
1.65%
Probability of exploitation in next 30 days
EPSS Percentile
74.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0165 is in the 62nd percentile among its peer group of 36,897 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-2gxj-qrp2-53jvcritical

Incorrect reliance on Trait memory layout in mopa

Jan 6, 2022

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/mopa/RUSTSEC-2021-0095.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2021-0095.html
Third Party Advisory