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CVE-2020-28596· NVD / CVE Program· CNA talos

A stack-based buffer overflow vulnerability exists in the Objparser::objparse() functionality of Prusa Research PrusaSlicer 2.2.0 and Master

A stack-based buffer overflow vulnerability exists in the Objparser::objparse() functionality of Prusa Research PrusaSlicer 2.2.0 and Master (commit 4b040b856). A specially crafted obj file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

HighCVSS 7.8 · v3.1—No exploit No fix recorded
Published
Feb 10, 2021
Updated
Jun 16, 2026
EPSS
1.4% · 72th percentile
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Report tools

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Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CNA vs NVD score

NVD
7.8
CNA · talos
8.8
1.0 point gap

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
prusa3dprusaslicer

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • prusa3d prusaslicer2.2.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (talos). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Prusa Research

    • Prusa Research PrusaSlicer 2.2.0 , Prusa Research PrusaSlicer Master (commit 4b040b856)affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12slic3r-prusaall versions—

Same product

prusa3d: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-28594A use-after-free vulnerability exists in the _3MF_Importer::_handle_end_model() functionality of Prusa Research PrusaSlicer 2.2.0 and Master
    31Monitor
  • CVE-2020-28598An out-of-bounds write vulnerability exists in the Admesh stl_fix_normal_directions() functionality of Prusa Research PrusaSlicer 2.2.0 and
    31Monitor
  • CVE-2020-28595An out-of-bounds write vulnerability exists in the Obj.cpp load_obj() functionality of Prusa Research PrusaSlicer 2.2.0 and Master (commit 4
    31Monitor
  • CVE-2023-47268In libslic3r/GCode/PostProcessor.cpp in Prusa PrusaSlicer through 2.6.1, a crafted 3mf project file can execute arbitrary code on a host whe
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

All records