CVE-2020-21816

Name: CVE-2020-21816
Creator: NVD / NIST
Published: 2021-05-17T19:15:07.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2020-21816 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

A heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.23%

65.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Gnu	Libredwg	0.10.2641

References

http://gnu.comNot Applicable
https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572890865Exploit, Issue Tracking, Patch, Third Party Advisory
http://gnu.comNot Applicable
https://github.com/LibreDWG/libredwg/issues/182#issuecomment-572890865Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

Published: May 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21816?

A heab based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:46.

How severe is CVE-2020-21816?

CVE-2020-21816 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21816?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21816?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST