What is CVE-2021-45846?

CVE-2021-45846 is a medium-severity vulnerability in Slic3r, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-01-25.

How severe is CVE-2021-45846?

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

NULL pointer dereference in Slic3r

CVE-2021-45846

A flaw in the AMF parser of Slic3r libslic3r 1.3.0 allows an attacker to cause an application crash using a crafted AMF document, where a metadata tag lacks a "type" attribute.

Published 2022-01-25 · 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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (47.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Slic3r — versions 1.3.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/slic3r/Slic3r/issues/5117 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-45846?: CVE-2021-45846 is a medium-severity vulnerability in Slic3r, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-01-25.
How severe is CVE-2021-45846?: Medium severity. CVSS v3 base score is 5.5 out of 10.