What is CVE-2020-21813?

CVE-2020-21813 is a high-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-05-17.

How severe is CVE-2020-21813?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in GNU Libredwg

CVE-2020-21813

A heap based buffer overflow issue exists in GNU LibreDWG 0.10.2641 via output_TEXT ../../programs/dwg2SVG.c:114.

Vulnerability class: Buffer Overflow

Published 2021-05-17 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

GNU Libredwg — versions 0.10.2641

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

af854a3a-2127-422b-91ae-364da2661108 (Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Broken Link)
github.com/LibreDWG/libredwg/issues/182 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-21813?: CVE-2020-21813 is a high-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-05-17.
How severe is CVE-2020-21813?: High severity. CVSS v3 base score is 7.8 out of 10.