CVE-2021-43043
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could...
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
- Record
CVE-2021-43043- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
- Record
CVE-2021-43043- Updated
- 2026-11-02
EUVDEUVD-2021-29997 No score
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
- Record
EUVD-2021-29997- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xhh9-3g8r-qgcp
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could...
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. The apache user could read arbitrary files such as /etc/shadow by abusing an insecure Sudo rule.
- Record
GHSA-xhh9-3g8r-qgcp- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-668
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43043 is a medium vulnerability (CVSS 6.5) in Kaseya Unitrends Backup, published December 6, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.46%, the 73rd percentile. No source names a fixed version.