CVE-2021-43045

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

2.96% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 87.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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

2022-01-06 18:00Z4 YR AGO

Last updated

2024-08-04 03:47Z2 YR AGO

Reserved

2021-10-27

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.1

Document digest

d2ebef6c10f6526bedfd97752b9c6c7aec4ea182745b1b3f8950b1dd17316c8a

• lists.apache.orghttps://lists.apache.org/thread/5fttw9vk6gd2p3b846nox7hcj5469xfdx_refsource_MISC
• www.openwall.com[oss-security] 20220106 CVE-2021-43045: Apache Avro: Possible DOS vulnerabilities in C# Avro SDKhttp://www.openwall.com/lists/oss-security/2022/01/06/8mailing-listx_refsource_MLIST