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CVE-2021-45703

30
FAUCET Score

CVE-2021-45703 is a critical vulnerability affecting the tectonic_xdv crate before version 0.1.12 in Rust, where the XdvParser::<T>::process function can read from uninitialized memory. This flaw carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely without user interaction, leading to high impacts on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage, suggesting a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.1.12CPE matchmatch criteria
cpe:2.3:a:tectonic_xdv_project:tectonic_xdv:*:*:*:*:*: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
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 51st percentile among its peer group of 36,862 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

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: tectonic_xdvFixed in: 0.1.12

Vendor Advisories (1)

rustGHSA-qwvx-c8j7-5g75critical

Use of Uninitialized Resource in tectonic_xdv

Jan 6, 2022

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/tectonic_xdv/RUSTSEC-2021-0112.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2021-0112.html
Third Party Advisory