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

Ranks above 66.2% 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 2026-06-17.

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 13:55Z4 YR AGO

Last updated

2024-08-04 14:30Z2 YR 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

5.1

Document digest

934f4baa356a4f6510a7f4e8de00d2050686068b9ad80ddd1b74d4a3ba0e88e1

• 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