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CVE-2003-1433

18
FAUCET Score

CVE-2003-1433 describes a vulnerability in Epic Games Unreal Engine versions 226f through 436, where the engine fails to validate the challenge key. This flaw allows remote attackers to exhaust the player limit by repeatedly joining a game. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial availability impact, as attackers can deny service by filling up game slots. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB, though it has garnered some community discussion with 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
226fCPE matchmatch criteria
cpe:2.3:a:epic_games:unreal_engine:226f:*:*:*:*:*:*:*
433CPE matchmatch criteria
cpe:2.3:a:epic_games:unreal_engine:433:*:*:*:*:*:*:*
436CPE matchmatch criteria
cpe:2.3:a:epic_games:unreal_engine:436:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 29th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

archives.neohapsis.com / archives/bugtraq/2003-02/0063.html
archives.neohapsis.com / archives/bugtraq/2003-02/0142.html
exchange.xforce.ibmcloud.com / vulnerabilities/11304
pivx.com / luigi/adv/ueng-adv.txt
securityfocus.com / bid/6771