Buffer overflow in Kaseya Unitrends_backup
CVE-2021-43042
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.
Vulnerability class: Buffer Overflow
EPSS: 0.029 (85.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kaseya Unitrends_backup
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43042?
- CVE-2021-43042 is a critical-severity vulnerability in Kaseya Unitrends_backup, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2021-12-06.
- How severe is CVE-2021-43042?
- Critical severity. CVSS v3 base score is 9.8 out of 10.