CVE-2021-43042

moderate-risk
Published 2021-12-06

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A buffer overflow existed in the vaultServer component. This was exploitable by a remote unauthenticated attacker.

Do I need to act?

~
3.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Kaseya

References (6)

Vendor Advisory https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
Exploit https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-applian...
Exploit https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-applian...
Vendor Advisory https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
Exploit https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-applian...
Exploit https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-applian...
44
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 7/34 · Low
Exposure 5/34 · Minimal