CVE-2006-4200: Unspecified vulnerability in 04WebServer 1.83 and earlier allows remote attackers to bypass user authenticatio

Q: How do I fix CVE-2006-4200?

04webserver: upgrade to newer than 1.83. Exact commands for each OS are on this page.

Q: Is CVE-2006-4200 being exploited?

CVE-2006-4200 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2006-4200 affect?

CVE-2006-4200 affects 04webserver. Severity is high (CVSS 7.5). Unspecified vulnerability in 04WebServer 1.83 and earlier allows remote attackers to bypass user authentication via unspecified vectors related to request processing.

This month

HIGH 7.5UPGRADE

CVE-2006-4200 is a high-severity flaw (CVSS 7.5) affecting 04webserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in 04WebServer 1.83 and earlier allows remote attackers to bypass user authentication via unspecified vectors related to request processing.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Published	2006-08-17
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: soft3304

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

Am I affected?

Timeline

2006-08-17 21:04 UTCPublished CVE record published
2026-06-16 22:28 UTCUpdated Record last modified

soft3304 04webserver UPGRADE

Affected: <= 1.83 · 1.5 · 1.42 · 1.81

Fixed in: newer than 1.83

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy 04webserver || rpm -q 04webserver || 04webserver --version

2. UPGRADE to newer than 1.83 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade 04webserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade 04webserver

Note

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

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-2006-4200?

04webserver: upgrade to newer than 1.83. Exact commands for each OS are on this page.

Is CVE-2006-4200 being exploited?

CVE-2006-4200 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-2006-4200 affect?

CVE-2006-4200 affects 04webserver. Severity is high (CVSS 7.5). Unspecified vulnerability in 04WebServer 1.83 and earlier allows remote attackers to bypass user authentication via unspecified vectors related to request processing.

How urgent is CVE-2006-4200?

Priority 45/100. High severity

Related CVEs

CVE-2006-4199 MEDIUM 6.8 UPGRADE Cross-site scripting (XSS) vulnerability in Soft3304 04WebServer 1.83 and earlier allows remote attackers to i
CVE-2005-1416 MEDIUM 5.0 DOWNGRADE Directory traversal vulnerability in 04WebServer 1.81 allows remote attackers to read files outside of the web
CVE-2004-2662 MEDIUM 5.0 DOWNGRADE Soft3304 04WebServer before 1.41 allows remote attackers to cause a denial of service (resource consumption or
CVE-2004-2661 MEDIUM 5.0 DOWNGRADE Soft3304 04WebServer before 1.41 does not properly check file names, which allows remote attackers to obtain s
CVE-2004-1514 MEDIUM 5.0 DOWNGRADE 04WebServer 1.42 allows remote attackers to cause a denial of service (fail to restart properly) via an HTTP r

References

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