CVE-2021-40386

CRITICAL 9.8CVE-2021-40386 · Published 15/04/2022 · updated 17/06/2026

In short

CVE-2021-40386 is a CRITICAL (CVSS 9.8) vulnerability affecting unitrends backup (kaseya).
Chance of exploitation in the next 30 days (EPSS): 1.9%, higher than 80.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
unitrends backup kaseya	`≤ 10.5.5`	No fix yet

Kaseya Unitrends Client/Agent through 10.5,5 allows remote attackers to execute arbitrary code.

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Package

Affected versions

Patched versions

≤ 10.5.5

No fix yet

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