CVE-2009-1800: Stack-based buffer overflow in the Chinagames CGAgent ActiveX control 1.x in CGAgent.dll, as distributed in Ch

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HIGH 7.5DOWNGRADE

CVE-2009-1800 is a high-severity flaw (CVSS 7.5) affecting igame. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in the Chinagames CGAgent ActiveX control 1.x in CGAgent.dll, as distributed in Chinagames iGame 2009, allows remote attackers to execute arbitrary code via a long argument to the CreateChinagames method, as exploited in the wild in April and May 2009. NOTE: some of these details are obtained from third party information.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	10.9% (top 4%)
CISA exploited list	No
Weakness	CWE-119
Published	2009-05-28
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: chinagames

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

Am I affected?

Timeline

2009-05-28 14:30 UTCPublished CVE record published
2026-06-16 23:08 UTCUpdated Record last modified

chinagames igame DOWNGRADE

Affected: 2009

Fixed in: no fixed release known

Safe to downgrade to: a release before 2009

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2009 (Debian / Ubuntu)

apt-cache madison igame sudo apt install igame=<VERSION_BEFORE_2009> sudo apt-mark hold igame

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

dnf --showduplicates list igame sudo dnf downgrade igame-<VERSION_BEFORE_2009> sudo dnf versionlock add igame

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: ChinaGames - 'CGAgent.dll' ActiveX Remote Code Execution

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-2009-1800?

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

Is CVE-2009-1800 being exploited?

CVE-2009-1800 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-2009-1800 affect?

CVE-2009-1800 affects igame. Severity is high (CVSS 7.5). Stack-based buffer overflow in the Chinagames CGAgent ActiveX control 1.x in CGAgent.dll, as distributed in Chinagames iGame 2009, allows remote attackers to execute arbitrary code via a long argument to the CreateChinagames method, as expl

How urgent is CVE-2009-1800?

Priority 55/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

References

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