What is CVE-2018-20999?

CVE-2018-20999 is a high-severity vulnerability in Orion Project, classified under Incorrect Calculation. CVSS score: 7.5/10. Published 2019-08-26.

How severe is CVE-2018-20999?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-20999 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Orion Project

CVE-2018-20999

An issue was discovered in the orion crate before 0.11.2 for Rust. reset() calls cause incorrect results.

Published 2019-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Orion Project

Weakness classification (CWE)

CWE-682 — Incorrect Calculation

Public proof-of-concept exploits

Artisan-Lab/Rust-memory-safety-bugs

References

rustsec.org/advisories/RUSTSEC-2018-0012.html (Third Party Advisory)
github.com/brycx/orion/issues/46 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20999?: CVE-2018-20999 is a high-severity vulnerability in Orion Project, classified under Incorrect Calculation. CVSS score: 7.5/10. Published 2019-08-26.
How severe is CVE-2018-20999?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-20999 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.