Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-39537

CVE-2021-39537HIGH

n/a n/a — An issue was discovered in ncurses through v6.2-1.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   R  U  H  H  H    8.8   .0322   88.0     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Aug 23  Reserved by mitre
  Sep 20  Published (CNA: mitre)
  Oct 8   ENRICHED — CVE-2021-39537. Received CVSS 8.8 and CPE data from NVD.
  Oct 8   EXPLOIT PUBLISHED — CVE-2021-39537. Public exploit reference added.

CWE-787 · CNA: mitre · CVSS v3.1 · 12 references · NVD status: Modified

Description

An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 23, 2021	Reserved	Reserved by mitre
September 20, 2021	Published	Published (CNA: mitre)
October 8, 2026	ENRICHED	ENRICHED — CVE-2021-39537. Received CVSS 8.8 and CPE data from NVD.
October 8, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2021-39537. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-787

References (12)

http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/ncurses/patches/patch-ncurses_tinfo_captoinfo.c?rev=1.1&content-type=text/x-cvsweb-markup [Patch, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/28 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/41 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/43 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/45 [Mailing List, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2023/12/msg00004.html
https://lists.gnu.org/archive/html/bug-ncurses/2020-08/msg00006.html [Exploit, Mailing List, Vendor Advisory]
https://lists.gnu.org/archive/html/bug-ncurses/2021-10/msg00023.html [Mailing List, Vendor Advisory]
https://security.netapp.com/advisory/ntap-20230427-0012/
https://support.apple.com/kb/HT213443 [Third Party Advisory]
https://support.apple.com/kb/HT213444 [Third Party Advisory]
https://support.apple.com/kb/HT213488 [Third Party Advisory]

Authoritative record: CVE-2021-39537 at cve.org

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-39537 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.