CVE•Published 2021-09-20•Modified 2026-10-08•1 article on news•6 live references•NVD data
CVE-2021-39537Invisible-island · Ncurses
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
88
Exploit Prediction Scoring System · top 12% of all CVEs
Weaknesses (CWE)
Description
An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.
Timeline
Published 2021-09-20
Modified 2026-10-08
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-2021-39537Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Invisible-island Ncurses"All exposed Invisible-island Ncurses instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Ncurses"HTTP body or banner mentions "Ncurses" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-39537Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-39537Censys host search filtered to this CVE id.
grep.app
CVE-2021-39537Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-39537GitHub code search for direct mentions.
Google dork
"CVE-2021-39537" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.