CVE-2020-21817

MEDIUM

CVSS v3.1: 6.5 · EPSS: 0.0091 (55.7 percentile)

NetworkNo privilegesNULL Pointer Deref

Source data as of:

At a glance

Severity
MEDIUM
CVSS
6.5 v3.1 · NVD
EPSS
0.0091 (55.7 percentile) · FIRST.org
CISA KEV
No
Type
NULL Pointer Deref · NVD CWE
Attack conditions (CVSS vector)
NetworkNo privileges · Source: NVD Vector
Affected vendors
gnu
Published
2021-05-17 · Modified: 2026-07-05
References
Jump to references (2)

CVSS / EPSS / KEV

CVSS v3.1 6.5 / 10 MEDIUM Source: NVD
EPSS 0.0091 55.7 percentile Source: FIRST.org
CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

A null pointer dereference issue exists in GNU LibreDWG 0.10.2641 via htmlescape ../../programs/escape.c:29. which causes a denial of service (application crash).

Record details

CVE ID
CVE-2020-21817
CVSS (v3.1)
6.5 (MEDIUM)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Exploitability subscore
2.8
Impact subscore
3.6
EPSS
0.0091 (55.7 percentile) — 2026-07-05
CISA KEV
No
Weakness (CWE)
CWE-476
Affected vendors
gnu
Affected configurations (CPE)
1
Published
2021-05-17
Modified
2026-07-05
Status
Modified

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

Related records

Other records sharing a factual facet, for cross-reference. A descriptive neighbourhood — ordering does not imply priority and is not a recommendation.

Same affected vendor

CVE-2020-21814 HIGH CVSS 8.8 CVE-2020-21816 HIGH CVSS 8.8 CVE-2020-21818 HIGH CVSS 8.8 CVE-2020-21819 HIGH CVSS 8.8

Same weakness type (CWE)

CVE-2024-24442 HIGH CVSS 7.5 CVE-2024-41338 HIGH CVSS 7.5 CVE-2020-21815 MEDIUM CVSS 6.5 CVE-2020-21834 MEDIUM CVSS 6.5

Published the same year

CVE-2020-22452 CRITICAL CVSS 9.8 CVE-2020-24193 CRITICAL CVSS 9.8 CVE-2020-24841 CRITICAL CVSS 9.8 CVE-2020-24913 CRITICAL CVSS 9.8
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