CVE-2021-43036

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

1.86% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 77.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-12-06 00:00Z4 YR AGO

Last updated

2024-08-04 03:47Z2 YR AGO

Reserved

2021-10-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-521Weak Password RequirementsBase

Data version

5.1

Document digest

d286c6756b25e481a64b138939b7ac50c7df47a6658939acdd59fff2f804dcd7

• helpdesk.kaseya.comhttps://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
• www.cyberonesecurity.comhttps://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1
• www.cyberonesecurity.comhttps://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2