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CVE-2021-28030

23
FAUCET Score

CVE-2021-28030 is a high-severity vulnerability (CVSS 7.5) in the Rust truetype crate (versions prior to 0.30.1) that allows attackers to read uninitialized memory via a crafted Read operation within Tape::take_bytes. This unauthenticated network-based attack could lead to high confidentiality impact. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.30.1CPE matchmatch criteria
cpe:2.3:a:truetype_project:truetype:*:*:*:*:*: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
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
61.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 38th 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 (1)

rustpatch availablevia ghsa
Product: truetypeFixed in: 0.30.1

Vendor Advisories (1)

rustGHSA-v7q4-97x4-4qw2high

Use of Uninitialized Resource in truetype

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2021-0029.html
PatchThird Party Advisory