# CVE-2020-28634

## Summary

- **CVE ID:** CVE-2020-28634
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-129
- **Published:** Apr 18, 2022
- **Last Modified:** Mar 14, 2026

## Description

Multiple code execution vulnerabilities exists in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. A specially crafted malformed file can lead to an out-of-bounds read and type confusion, which could lead to code execution. An attacker can provide malicious input to trigger any of these vulnerabilities. An oob read vulnerability exists in Nef_S2/SNC_io_parser.h SNC_io_parser<EW>::read_sedge() seh->next().

## Affected Products

- CGAL Project — libcgal (CGAL-5.1.1)

## References

- [CNA](https://talosintelligence.com/vulnerability_reports/TALOS-2020-1225)
- [CNA](https://lists.debian.org/debian-lts-announce/2022/12/msg00011.html)
- [CNA](https://security.gentoo.org/glsa/202305-34)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.50%
- **EPSS Percentile:** 65.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._