CVE-2003-1510: TinyWeb 1.9 allows remote attackers to cause a denial of service (CPU consumption) via a ".%00." in an HTTP GE

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HIGH 7.8DOWNGRADE

CVE-2003-1510 is a high-severity flaw (CVSS 7.8) affecting tinyweb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TinyWeb 1.9 allows remote attackers to cause a denial of service (CPU consumption) via a ".%00." in an HTTP GET request to the cgi-bin directory.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: rit research labs

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

rit research labs tinyweb DOWNGRADE

Affected: 1.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.9 (Debian / Ubuntu)

apt-cache madison tinyweb sudo apt install tinyweb=<VERSION_BEFORE_1.9> sudo apt-mark hold tinyweb

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

dnf --showduplicates list tinyweb sudo dnf downgrade tinyweb-<VERSION_BEFORE_1.9> sudo dnf versionlock add tinyweb

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-2003-1510?

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

Is CVE-2003-1510 being exploited?

CVE-2003-1510 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-2003-1510 affect?

CVE-2003-1510 affects tinyweb. Severity is high (CVSS 7.8). TinyWeb 1.9 allows remote attackers to cause a denial of service (CPU consumption) via a ".%00." in an HTTP GET request to the cgi-bin directory.

How urgent is CVE-2003-1510?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2026-29046 HIGH 8.2 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-28497 CRITICAL 9.1 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27633 HIGH 7.5 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27630 HIGH 7.5 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32
CVE-2026-27613 CRITICAL 9.8 UPGRADE TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32

References

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