CVE-2020-28598

Code execution via reversed-facet vector overflow

Published Jul 8, 2021 · Updated Aug 4, 2024

Out-of-bounds write in PrusaSlicer 2.2.0 and master commit 4b040b856 allows attackers to execute code through a crafted AMF file. The stl_fix_normal_directions() routine sizes reversed_ids to the facet count but can record the same facet repeatedly, advancing reversed_count beyond the vector and writing a neighbor identifier out of bounds. Exploitation requires a user to open or import the malicious file, after which code runs with the application user's privileges; malformed input can instead crash the process.

CVSS severity7.8
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in PrusaSlicer 2.2.0 and master commit 4b040b856 allows attackers to execute code through a crafted AMF file. The stl_fix_normal_directions() routine sizes reversed_ids to the facet count but can record the same facet repeatedly, advancing reversed_count beyond the vector and writing a neighbor identifier out of bounds. Exploitation requires a user to open or import the malicious file, after which code runs with the application user's privileges; malformed input can instead crash the process.

The record

CVE
CVE-2020-28598
Published
Jul 8, 2021
Updated
Aug 4, 2024
Vendor
Prusa Research
Product
PrusaSlicer
Classifications
CWE-787, CWE-122, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Prusa Research PrusaSlicer 2.2.0 ,Prusa Research PrusaSlicer Master (commit 4b040b856)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Prusa Research · PrusaSlicerversion=Prusa Research PrusaSlicer 2.2.0 ,Prusa Research PrusaSlicer Master (commit 4b040b856)

Published CVSS scores

6.8NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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