Medium severity · published Dec 6, 2021
CVE-2021-43039
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5
6.5
CVSS
1.3%
EPSS
No
On KEV
Description
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The Samba file sharing service allowed anonymous read/write access.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UB
Unitrends Backup · Kaseya
10.0 before 10.5.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43039
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43039
Vendor Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
Exploit
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1
Exploit
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2
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