CVE-2020-21841

Name: CVE-2020-21841
Creator: NVD / NIST
Published: 2021-05-17T21:15:07.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.37%

Last modified Jun 17, 2026

CVE-2020-21841 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_read_B ../../src/bits.c:135.. EPSS estimates a 1.37% chance of exploitation in the next 30 days.

Description

A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_read_B ../../src/bits.c:135.

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

1.37%

68.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Gnu	Libredwg	0.10

References

http://gnu.comNot Applicable
http://libredwg.comBroken Link
https://github.com/LibreDWG/libredwg/issues/188#issuecomment-574493775Exploit, Issue Tracking, Patch, Third Party Advisory
http://gnu.comNot Applicable
http://libredwg.comBroken Link
https://github.com/LibreDWG/libredwg/issues/188#issuecomment-574493775Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-21841?

A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_read_B ../../src/bits.c:135.

How severe is CVE-2020-21841?

CVE-2020-21841 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21841?

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-2020-21841?

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

Scan your code now

Source: NVD / NIST