CVE-2020-21913

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 68.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-09-20 13:55Z5 YR AGO

Last updated

2026-10-14 09:35Z15 DAYS AGO

Reserved

2020-08-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

64cc793ceff8114ea11db8f04e00a59832348e48760d5fd7c1adc70e1489502f

• unicode-org.atlassian.nethttps://unicode-org.atlassian.net/browse/ICU-20850x_refsource_MISC
• github.comhttps://github.com/unicode-org/icu/pull/886x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20211012 [SECURITY] [DLA 2784-1] icu security updatehttps://lists.debian.org/debian-lts-announce/2021/10/msg00008.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-5014https://www.debian.org/security/2021/dsa-5014vendor-advisoryx_refsource_DEBIAN
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html