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-2020-21913

CVE-2020-21913MEDIUM

n/a n/a — International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode f…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  N  N  H    5.5   .0121   68.0     —

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

TIMELINE
  Aug 13  Reserved by mitre
  Sep 20  Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2020-21913. Received CVSS 5.5 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2020-21913. Public exploit reference added.

CWE-416 · CNA: mitre · CVSS v3.1 · 5 references · NVD status: Modified

Description

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
August 13, 2020	Reserved	Reserved by mitre
September 20, 2021	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2020-21913. Received CVSS 5.5 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2020-21913. 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-416

References (5)

https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/unicode-org/icu/pull/886 [Patch, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2021/10/msg00008.html [Mailing List, Third Party Advisory]
https://unicode-org.atlassian.net/browse/ICU-20850 [Exploit, Vendor Advisory]
https://www.debian.org/security/2021/dsa-5014 [Third Party Advisory]

Authoritative record: CVE-2020-21913 at cve.org

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-21913 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.