CVE-2020-21598

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

1.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 76.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2021-09-16 00:00Z4 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-787Out-of-bounds WriteBase

Data version

5.1

Document digest

1e15771667cdb204830d1aa70a617625a586d4f45b0e02da4b922c5a7a81432b

• github.comhttps://github.com/strukturag/libde265/issues/237
• cwe.mitre.orghttps://cwe.mitre.org/data/definitions/122.html
• lists.debian.org[debian-lts-announce] 20230124 [SECURITY] [DLA 3280-1] libde265 security updatehttps://lists.debian.org/debian-lts-announce/2023/01/msg00020.htmlmailing-list
• www.debian.orgDSA-5346https://www.debian.org/security/2023/dsa-5346vendor-advisory