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CVE-2018-6328

82
FAUCET Score

CVE-2018-6328 is a critical authentication bypass vulnerability affecting Unitrends Backup (UB) versions prior to 10.1.0, allowing unauthenticated attackers to inject arbitrary commands into the /api/hosts parameters. With a CVSS score of 9.8, this network-exploitable flaw requires no user interaction and grants full confidentiality, integrity, and availability compromise. While not on the KEV catalog, public exploit modules exist for Metasploit and ExploitDB, indicating a high potential for exploitation, despite limited community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.1CPE matchmatch criteria
cpe:2.3:a:kaseya:unitrends_backup:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
64.93%
Probability of exploitation in next 30 days
EPSS Percentile
99.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: Unitrends UEB http api remote code execution · Aug 8, 2017
ExploitDB: EDB-45559 · Oct 8, 2018
This CVE's current EPSS score of 0.6493 is in the 97th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.unitrends.com / UnitrendsBackup/s/article/000001150
Vendor Advisory
support.unitrends.com / UnitrendsBackup/s/article/000006002
Vendor Advisory
exploit-db.com / exploits/44297
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/45559
ExploitThird Party AdvisoryVDB Entry