CVE•Published 2021-05-17•Modified 2026-07-09•1 article on news•6 live references•NVD data

CVE-2020-21819Gnu · Libredwg

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 35% of all CVEs

Weaknesses (CWE)

CWE-787Out-of-bounds Write

Description

A heap based buffer overflow vulnerability exists in GNU LibreDWG 0.10.2641via htmlescape ../../programs/escape.c:51.

Timeline

Published 2021-05-17

Modified 2026-07-09

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2020-21819

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Gnu Libredwg" version:"0.10.2641"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"Libredwg"

HTTP body or banner mentions "Libredwg" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2020-21819

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2020-21819

Censys host search filtered to this CVE id.

grep.app

CVE-2020-21819

Public source-code mentions — fast PoC discovery.

GitHub code

CVE-2020-21819

GitHub code search for direct mentions.

Google dork

"CVE-2020-21819" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub (7)

CVE-2020-218197 repos

0xor0ne/awesome-listunknown

Cybersecurity oriented awesome list

★ 3,896·updated 6d ago

V33RU/awesome-connected-things-secunknown

A Curated list of Security Resources for all connected things

★ 3,410·updated 2mo ago

H4lo/awesome-IoT-security-articleunknown

Collect some iot-related security articles, including vulnerability analysis, security conferences and papers, etc.

★ 307·updated 1y ago

Nsbx/awesome-starsunknown

My Awesome List generated by : https://github.com/abhijithvijayan/stargazed

★ 11·updated today

BigPolarBear1/CVEsunknown

★ 3·updated 4mo ago

Jalexander798/JA_Tools-Cybersecurity-Resource-2unknown

★ 2·updated 11mo ago

kolaarionvull/awesome-listunknown

Forked from https://github.com/0xor0ne/awesome-list.git

★ 1·updated 9mo ago