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CRITICAL

CVE-2021-43036

CVSS v3

9.8

CRITICAL

EPSS Score

1.9 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The password for the PostgreSQL wguest account is weak.

Technical details

Published
2021-12-06

Frequently asked questions

What is CVE-2021-43036?

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The password for the PostgreSQL wguest account is weak.

Is CVE-2021-43036 actively exploited?

Active exploitation of CVE-2021-43036 has not been confirmed. Its EPSS score was 1.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-43036?

CVE-2021-43036 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2021-43036 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

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