CVE-2018-6328
It was discovered that the Unitrends Backup (UB) before 10.1.0 user interface was exposed to an authentication bypass, which then could allow an unauthenticated user to inject arbitrary commands into its /api/hosts parameters using backquotes.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 64.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
It was discovered that the Unitrends Backup (UB) before 10.1.0 user interface was exposed to an authentication bypass, which then could allow an unauthenticated user to inject arbitrary commands into its /api/hosts parameters using backquotes.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 64.37% probability · 99th percentile
- Public exploits
- 2 in Exploit-DB · verified · first 16 March 2018
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- kaseya/unitrends backup
- Source
- cve@mitre.org
EPSS moved from 54.0% on 21 September 2026 to 64.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://support.unitrends.com/UnitrendsBackup/s/article/000001150Vendor Advisory
- https://support.unitrends.com/UnitrendsBackup/s/article/000006002Vendor Advisory
- https://www.exploit-db.com/exploits/44297/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45559/Exploit, Third Party Advisory, VDB Entry
- https://support.unitrends.com/UnitrendsBackup/s/article/000001150Vendor Advisory
- https://support.unitrends.com/UnitrendsBackup/s/article/000006002Vendor Advisory
- https://www.exploit-db.com/exploits/44297/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45559/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.