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CVE-2003-1433
Epic Games Unreal Engine 226f through 436 does not validate the challenge key, which allows remote attackers to exhaust the player limit…
Medium4.3EPSS 1.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Epic Games Unreal Engine 226f through 436 does not validate the challenge key, which allows remote attackers to exhaust the player limit by joining the game multiple times.
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 17 years later
· 17 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
n/a
- affected n/a
References (5)
- 6771 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.pivx.com/luigi/adv/ueng-adv.txt (opens in a new tab)x_refsource_MISCx_transferred
- ut-join-request-dos(11304) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20030205 Unreal engine: results of my research (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20030211 Re: Epic Games threatens to sue security researchers (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2003-1433)Record last updated .