CVE-2018-25261: Iperius Backup 5.8.1 contains a local buffer overflow vulnerability in the structured exception handling (SEH)

Routine

HIGH 8.4DOWNGRADE

CVE-2018-25261 is a high-severity flaw (CVSS 8.4) affecting iperius backup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Iperius Backup 5.8.1 contains a local buffer overflow vulnerability in the structured exception handling (SEH) mechanism that allows local attackers to execute arbitrary code by supplying a malicious file path. Attackers can create a backup job with a crafted payload in the external file location field that triggers a buffer overflow when the backup job executes, enabling code execution with application privileges.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-22
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: entersrl

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

Am I affected?

Timeline

2026-04-22 16:16 UTCPublished CVE record published
2026-06-17 01:55 UTCUpdated Record last modified

entersrl iperius backup DOWNGRADE

Affected: 5.8.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.8.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.8.1 (Debian / Ubuntu)

apt-cache madison iperius-backup sudo apt install iperius-backup=<VERSION_BEFORE_5.8.1> sudo apt-mark hold iperius-backup

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

dnf --showduplicates list iperius-backup sudo dnf downgrade iperius-backup-<VERSION_BEFORE_5.8.1> sudo dnf versionlock add iperius-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-2018-25261?

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

Is CVE-2018-25261 being exploited?

CVE-2018-25261 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-2018-25261 affect?

CVE-2018-25261 affects iperius backup. Severity is high (CVSS 8.4). Iperius Backup 5.8.1 contains a local buffer overflow vulnerability in the structured exception handling (SEH) mechanism that allows local attackers to execute arbitrary code by supplying a malicious file path. Attackers can create a backup

How urgent is CVE-2018-25261?

Priority 37/100. High severity; Public exploit reference

References

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