CVE-2008-3871: Multiple format string vulnerabilities in UltraISO 9.3.1.2633, and possibly other versions before 9.3.3.2685,

This month

HIGH 9.3DOWNGRADE

CVE-2008-3871 is a high-severity flaw (CVSS 9.3) affecting ultraiso. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple format string vulnerabilities in UltraISO 9.3.1.2633, and possibly other versions before 9.3.3.2685, allow user-assisted attackers to execute arbitrary code via format string specifiers in the filename of a (1) DAA or (2) ISZ file.

Why this priority

Critical severity

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

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-134
Published	2009-04-01
Last modified	2026-06-16

Publisher (CNA): Flexera Software LLC · Vendor: ezbsystems

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-04-01 18:00 UTCPublished CVE record published
2026-06-16 22:56 UTCUpdated Record last modified

ezbsystems ultraiso DOWNGRADE

Affected: 9.3.1.2633

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.3.1.2633

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.3.1.2633 (Debian / Ubuntu)

apt-cache madison ultraiso sudo apt install ultraiso=<VERSION_BEFORE_9.3.1.2633> sudo apt-mark hold ultraiso

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

dnf --showduplicates list ultraiso sudo dnf downgrade ultraiso-<VERSION_BEFORE_9.3.1.2633> sudo dnf versionlock add ultraiso

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-2008-3871?

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

Is CVE-2008-3871 being exploited?

CVE-2008-3871 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-2008-3871 affect?

CVE-2008-3871 affects ultraiso. Severity is high (CVSS 9.3). Multiple format string vulnerabilities in UltraISO 9.3.1.2633, and possibly other versions before 9.3.3.2685, allow user-assisted attackers to execute arbitrary code via format string specifiers in the filename of a (1) DAA or (2) ISZ file.

How urgent is CVE-2008-3871?

Priority 54/100. Critical severity

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References

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