CVE-2020-21913

Name: CVE-2020-21913
Creator: NVD / NIST
Published: 2021-09-20T14:15:08.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.13%

Last modified Jun 17, 2026

CVE-2020-21913 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

1.13%

62.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Unicode	International Components For Unicode	< 66.1
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/unicode-org/icu/pull/886Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00008.htmlMailing List, Third Party Advisory
https://unicode-org.atlassian.net/browse/ICU-20850Exploit, Vendor Advisory
https://www.debian.org/security/2021/dsa-5014Third Party Advisory
https://github.com/unicode-org/icu/pull/886Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00008.htmlMailing List, Third Party Advisory
https://unicode-org.atlassian.net/browse/ICU-20850Exploit, Vendor Advisory
https://www.debian.org/security/2021/dsa-5014Third Party Advisory

Timeline

Published: Sep 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21913?

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.

How severe is CVE-2020-21913?

CVE-2020-21913 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.13% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21913?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21913?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST