What is CVE-2020-23861?

CVE-2020-23861 is a medium-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-05-18.

How severe is CVE-2020-23861?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in GNU Libredwg

CVE-2020-23861

A heap-based buffer overflow vulnerability exists in LibreDWG 0.10.1 via the read_system_page function at libredwg-0.10.1/src/decode_r2007.c:666:5, which causes a denial of service by submitting a dwg file.

Vulnerability class: Buffer Overflow

Published 2021-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

GNU Libredwg — versions 0.10.1

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/LibreDWG/libredwg/issues/248 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-23861?: CVE-2020-23861 is a medium-severity vulnerability in GNU Libredwg, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-05-18.
How severe is CVE-2020-23861?: Medium severity. CVSS v3 base score is 5.5 out of 10.