CVE-2025-43596: An insecure file system permissions vulnerability in MSP360 Backup 8.0 allows a low privileged user to execute

Routine

HIGH 7.8UPGRADE

CVE-2025-43596 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 8.0 allows a low privileged user to execute commands with SYSTEM level privileges using a specially crafted file with an arbitrary file backup target. Upgrade to MSP360 Backup 8.1.1.19 (released on 2025-05-15).

Why this priority

High severity

A fixed release or distro patch exists.

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 61%)
CISA exploited list	No
Weakness	CWE-276
Published	2025-05-22
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

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

msp360 backup UPGRADE

Affected: >= 8.0 and < 8.1.1.19

Fixed in: 8.1.1.19

Safe to downgrade to: a release before 8.0

1. Check installed version

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

2. UPGRADE to 8.1.1.19 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade backup

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade backup

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.0 (Debian / Ubuntu)

apt-cache madison backup sudo apt install backup=<VERSION_BEFORE_8.0> sudo apt-mark hold backup

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list backup sudo dnf downgrade backup-<VERSION_BEFORE_8.0> 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-2025-43596?

backup: upgrade to 8.1.1.19. Exact commands for each OS are on this page.

Is CVE-2025-43596 being exploited?

CVE-2025-43596 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-2025-43596 affect?

CVE-2025-43596 affects backup. Severity is high (CVSS 7.8). An insecure file system permissions vulnerability in MSP360 Backup 8.0 allows a low privileged user to execute commands with SYSTEM level privileges using a specially crafted file with an arbitrary file backup target. Upgrade to MSP360 Back

How urgent is CVE-2025-43596?

Priority 37/100. High severity

Related CVEs

CVE-2025-43595 HIGH 7.8 DOWNGRADE An insecure file system permissions vulnerability in MSP360 Backup 4.3.1.115 allows a low privileged user to e
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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