What is CVE-2021-44962?

CVE-2021-44962 is a medium-severity vulnerability in Slic3r Libslic3r, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2022-03-01.

How severe is CVE-2021-44962?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Out-of-bounds Read in Slic3r Libslic3r

CVE-2021-44962

An out-of-bounds read vulnerability exists in the GCode::extrude() functionality of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. A specially crafted stl file could lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.

Vulnerability class: Buffer Overflow

Published 2022-03-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.001

Affected products

Slic3r Libslic3r — versions 1.3.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

hackmd.io/KSI1bwGfSyO7T8UCf0HeTw (Exploit, Third Party Advisory)
slic3r.org (Product, Vendor Advisory)

Frequently asked questions

What is CVE-2021-44962?: CVE-2021-44962 is a medium-severity vulnerability in Slic3r Libslic3r, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2022-03-01.
How severe is CVE-2021-44962?: Medium severity. CVSS v3 base score is 5.5 out of 10.