CVE•Published 2021-05-17•Modified 2026-07-09•1 article on news•5 live references•NVD data
CVE-2020-21843Gnu · 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
65
Exploit Prediction Scoring System · top 35% of all CVEs
Weaknesses (CWE)
Description
A heap based buffer overflow vulnerability exits in GNU LibreDWG 0.10 via bit_read_RC ../../src/bits.c:318.
Timeline
Published 2021-05-17
Modified 2026-07-09
External references
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-2020-21843Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Gnu Libredwg" version:"0.10"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-2020-21843Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2020-21843Censys host search filtered to this CVE id.
grep.app
CVE-2020-21843Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2020-21843GitHub code search for direct mentions.
Google dork
"CVE-2020-21843" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.