What is CVE-2021-38187?

CVE-2021-38187 is a critical-severity vulnerability in Anymap Project, classified under Incorrect Conversion between Numeric Types. CVSS score: 9.8/10. Published 2021-08-08.

How severe is CVE-2021-38187?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Anymap Project

CVE-2021-38187

An issue was discovered in the anymap crate through 0.12.1 for Rust. It violates soundness via conversion of a *u8 to a *u64.

Published 2021-08-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (72.8th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Anymap Project

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

References

rustsec.org/advisories/RUSTSEC-2021-0065.html (Exploit, Patch, Third Party Advisory, Issue Tracking)
raw.githubusercontent.com/rustsec/advisory-db/main/crates/anymap/RUSTSEC-2021-0… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-38187?: CVE-2021-38187 is a critical-severity vulnerability in Anymap Project, classified under Incorrect Conversion between Numeric Types. CVSS score: 9.8/10. Published 2021-08-08.
How severe is CVE-2021-38187?: Critical severity. CVSS v3 base score is 9.8 out of 10.