CVE-2025-43595: An insecure file system permissions vulnerability in MSP360 Backup 4.3.1.115 allows a low privileged user to e

Routine

HIGH 7.8DOWNGRADE

CVE-2025-43595 is a high-severity flaw (CVSS 7.8) affecting backup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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).

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-276
Published	2025-05-01
Last modified	2026-06-17

Publisher (CNA): Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government · Vendor: msp360

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-01 22:15 UTCPublished CVE record published
2026-06-17 09:24 UTCUpdated Record last modified

msp360 backup DOWNGRADE

Affected: 4.3.1.115

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.3.1.115

1. Check installed version

apt-cache policy backup || rpm -q backup || backup --version

2. No fixed release: DOWNGRADE to a release before 4.3.1.115 (Debian / Ubuntu)

apt-cache madison backup sudo apt install backup=<VERSION_BEFORE_4.3.1.115> sudo apt-mark hold backup

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list backup sudo dnf downgrade backup-<VERSION_BEFORE_4.3.1.115> sudo dnf versionlock add backup

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-43595?

backup: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-43595 being exploited?

CVE-2025-43595 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-43595 affect?

CVE-2025-43595 affects backup. Severity is high (CVSS 7.8). 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).

How urgent is CVE-2025-43595?

Priority 37/100. High severity

Related CVEs

CVE-2025-43596 HIGH 7.8 UPGRADE An insecure file system permissions vulnerability in MSP360 Backup 8.0 allows a low privileged user to execute
CVE-2025-23082 HIGH 7.2 UPGRADE Veeam Backup for Microsoft Azure is vulnerable to Server-Side Request Forgery (SSRF)

References

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