CVE-2021-43041

HIGH

Kaseya Unitrends Backup <10.5.5 - Format String

Title source: llm

Description

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A crafted HTTP request could induce a format string vulnerability in the privileged vaultServer application.

References (3)

[Vendor Advisory] https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961

[Exploit, Third Party Advisory] https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1

[Exploit, Third Party Advisory] https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2

Scores

CVSS v3 8.8

EPSS 0.0142

EPSS Percentile 80.6%

Attack Vector NETWORK

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

Details

CWE

CWE-134

Status published

Products (1)

kaseya/unitrends_backup 10.0 - 10.5.5

Published Dec 06, 2021

Tracked Since Feb 18, 2026