CVE-2004-0326: Buffer overflow in the web proxy for GateKeeper Pro 4.7 allows remote attackers to execute arbitrary code via

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HIGH 10.0DOWNGRADE

CVE-2004-0326 is a high-severity flaw (CVSS 10.0) affecting professional gatekeeper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the web proxy for GateKeeper Pro 4.7 allows remote attackers to execute arbitrary code via a long GET request.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	62.8% (top 1%)
CISA exploited list	No
Published	2004-11-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: proxy-pro

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

Am I affected?

Timeline

2004-11-23 05:00 UTCPublished CVE record published
2026-06-16 22:05 UTCUpdated Record last modified

proxy-pro professional gatekeeper DOWNGRADE

Affected: 4.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.7

1. Check installed version

apt-cache policy professional-gatekeeper || rpm -q professional-gatekeeper || professional-gatekeeper --version

2. No fixed release: DOWNGRADE to a release before 4.7 (Debian / Ubuntu)

apt-cache madison professional-gatekeeper sudo apt install professional-gatekeeper=<VERSION_BEFORE_4.7> sudo apt-mark hold professional-gatekeeper

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

dnf --showduplicates list professional-gatekeeper sudo dnf downgrade professional-gatekeeper-<VERSION_BEFORE_4.7> sudo dnf versionlock add professional-gatekeeper

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: Proxy-Pro Professional GateKeeper 4.7 - GET Overflow (Metasploit)
Exploit-DB: Proxy-Pro Professional GateKeeper 4.7 Web Proxy - Buffer Overrun
Exploit-DB: Proxy-Pro Professional GateKeeper Pro 4.7 - Web proxy Remote Buffer Overflow
Metasploit: Proxy-Pro Professional GateKeeper 4.7 GET Request Overflow

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-2004-0326?

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

Is CVE-2004-0326 being exploited?

CVE-2004-0326 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-2004-0326 affect?

CVE-2004-0326 affects professional gatekeeper. Severity is high (CVSS 10.0). Buffer overflow in the web proxy for GateKeeper Pro 4.7 allows remote attackers to execute arbitrary code via a long GET request.

How urgent is CVE-2004-0326?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

References

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