CVE-2004-1556: MyWebServer 1.0.3 allows remote attackers to cause a denial of service (application crash) via a large number

Routine

MEDIUM 5.0DOWNGRADE

CVE-2004-1556 is a medium-severity flaw (CVSS 5.0) affecting mywebserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MyWebServer 1.0.3 allows remote attackers to cause a denial of service (application crash) via a large number of connections within a short time.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mywebserver

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 22:07 UTCUpdated Record last modified

mywebserver mywebserver DOWNGRADE

Affected: 1.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.3 (Debian / Ubuntu)

apt-cache madison mywebserver sudo apt install mywebserver=<VERSION_BEFORE_1.0.3> sudo apt-mark hold mywebserver

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

dnf --showduplicates list mywebserver sudo dnf downgrade mywebserver-<VERSION_BEFORE_1.0.3> sudo dnf versionlock add mywebserver

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-2004-1556?

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

Is CVE-2004-1556 being exploited?

CVE-2004-1556 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-2004-1556 affect?

CVE-2004-1556 affects mywebserver. Severity is medium (CVSS 5.0). MyWebServer 1.0.3 allows remote attackers to cause a denial of service (application crash) via a large number of connections within a short time.

How urgent is CVE-2004-1556?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2004-1557 MEDIUM 6.4 DOWNGRADE MyWebServer 1.0.3 allows remote attackers to bypass authentication, modify configuration, and read arbitrary f
CVE-2002-1897 MEDIUM 5.0 DOWNGRADE MyWebServer LLC MyWebServer 1.0.2 allows remote attackers to cause a denial of service (crash) via a long HTTP
CVE-2002-1454 MEDIUM 5.0 DOWNGRADE MyWebServer 1.0.2 allows remote attackers to determine the absolute path of the web document root via a reques
CVE-2002-1453 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in MyWebServer 1.0.2 allows remote attackers to insert script and HTM
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References

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