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CVE-2020-35633

29
FAUCET Score

CVE-2020-35633 is a code execution vulnerability in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1, specifically an out-of-bounds read and type confusion in SNC_io_parser.h. This flaw affects CGAL Computational Geometry Algorithms Library and Debian Linux distributions. With a CVSS score of 8.8 (High), an unauthenticated attacker can exploit this remotely by tricking a user into processing a specially crafted malformed file, leading to high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB) is currently unavailable, though the vulnerability has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
5.1.1CPE matchmatch criteria
cpe:2.3:a:cgal:computational_geometry_algorithms_library:5.1.1:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.33%
Probability of exploitation in next 30 days
EPSS Percentile
81.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0233 is in the 81st percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.debian.org / debian-lts-announce/2022/12/msg00011.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202305-34
talosintelligence.com / vulnerability_reports/TALOS-2020-1225
ExploitThird Party Advisory