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VULNERABILITIES

CVE-2021-43042 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961 CVEVendor Advisory
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1 CVEExploitThird Party Advisory
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2 CVEExploitThird Party Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961 [email protected]Vendor Advisory
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1 [email protected]ExploitThird Party Advisory

see all 6 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')[email protected]

Affected Products

ProductVersions
kaseya unitrends backup
>= 10.0, < 10.5.5

CPE

  • cpe:2.3:a:kaseya:unitrends_backup:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-43042
NVD Published Date:
Dec 6, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-43042 Details - Not Deferred