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CVE-2021-29930

24
FAUCET Score

CVE-2021-29930 describes a high-severity vulnerability in the Rust arenavec crate, where a panic during T::default() can lead to the dropping of uninitialized memory. This issue, rated 7.5 CVSS (High), allows for a remote, low-complexity attack resulting in high availability impact (A:H), though it does not affect confidentiality or integrity. There is currently no evidence of active exploitation, nor are there public exploits or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2021-01-12CPE matchmatch criteria
cpe:2.3:a:arenavec_project:arenavec:*:*:*:*:*: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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
1.14%
Probability of exploitation in next 30 days
EPSS Percentile
63.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0114 is in the 41st 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

Vendor Advisories (1)

rustGHSA-327x-39hh-65wfhigh

Out of bounds write in arenavec

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2021-0040.html
ExploitVendor Advisory