CVE-2004-2555: Riverdeep FoolProof Security 3.9.x on Windows 98 and Windows ME uses weak cryptography (arithmetic and XOR ope

Routine

LOW 2.1DOWNGRADE

CVE-2004-2555 is a low-severity flaw (CVSS 2.1) affecting foolproof security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Riverdeep FoolProof Security 3.9.x on Windows 98 and Windows ME uses weak cryptography (arithmetic and XOR operations) to relate the Control password to the Administrator password, which allows local users to calculate the Administrator password if they know the Control password and password recovery key.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: smartstuff

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:09 UTCUpdated Record last modified

smartstuff foolproof security DOWNGRADE

Affected: 3.9 · 3.9.4 · 3.9.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.9

1. Check installed version

apt-cache policy foolproof-security || rpm -q foolproof-security || foolproof-security --version

2. No fixed release: DOWNGRADE to a release before 3.9 (Debian / Ubuntu)

apt-cache madison foolproof-security sudo apt install foolproof-security=<VERSION_BEFORE_3.9> sudo apt-mark hold foolproof-security

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

dnf --showduplicates list foolproof-security sudo dnf downgrade foolproof-security-<VERSION_BEFORE_3.9> sudo dnf versionlock add foolproof-security

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: SmartStuff FoolProof Security Program 3.9.x - Administrative Password Recovery

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-2004-2555?

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

Is CVE-2004-2555 being exploited?

CVE-2004-2555 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-2004-2555 affect?

CVE-2004-2555 affects foolproof security. Severity is low (CVSS 2.1). Riverdeep FoolProof Security 3.9.x on Windows 98 and Windows ME uses weak cryptography (arithmetic and XOR operations) to relate the Control password to the Administrator password, which allows local users to calculate the Administrator pas

How urgent is CVE-2004-2555?

Priority 27/100. Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

CVE-2001-0030 HIGH 7.2 DOWNGRADE FoolProof 3.9 allows local users to bypass program execution restrictions by downloading the restricted execut

References

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