How severe is CVE-2021-45846?

CVE-2021-45846 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45846 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45846?

CVE-2021-45846 affects Slic3r. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45846?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-45846 published?

CVE-2021-45846 was published on 2022-01-25 and last updated on 2026-06-17.

CVE-2021-45846

CVE-2021-45846 is a medium-severity vulnerability in Slic3r with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Slic3r
Published: 2022-01-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-45846?: CVE-2021-45846 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45846 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45846?: CVE-2021-45846 affects Slic3r. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45846?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45846 published?: CVE-2021-45846 was published on 2022-01-25 and last updated on 2026-06-17.

References

https://github.com/slic3r/Slic3r/issues/5117

Affected products (1)

cpe:2.3:a:slic3r:slic3r:1.3.0:*:*:*:*:*:*:*

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