CVE-2025-43595: MSP360 Backup (for Linux) insecure filesystem permissions

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-01 · updated 2026-06-17
Weakness: CWE-276

Description

An insecure file system permissions vulnerability in MSP360 Backup 4.3.1.115 allows a low privileged user to execute commands with root privileges in the 'Online Backup' folder. Upgrade to MSP360 Backup 4.4 (released on 2025-04-22).

Affected products

MSP360 Backup: 4.3.1.115

References

https://help.msp360.com/cloudberry-backup-mac-linux/whats-new
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-119-01.json
https://www.cve.org/CVERecord?id=CVE-2025-43595

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