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Vulnerabilities

Vulnerability · CVE-2011-10020

Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake.

Published Aug 20, 2025 · catalog updated May 15, 2026 · Kaillera Project Server

Check if you run it

No confirmed exploitation is on record for CVE-2011-10020. EPSS is 1.31%. Act only if a listed version of Kaillera Project Server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.31%
Remediation
Vendor / distro source
Affected products
vendor Kaillera Project Server 0 ≤0.86

Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake. Once a client sends a valid HELLO0.83 packet and receives a response, any subsequent malformed packet causes the server to crash and become unresponsive. This flaw stems from improper input validation in the server’s UDP packet handler, allowing unauthenticated remote attackers to disrupt service availability.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Kaillera Project Server 0 ≤0.860 ≤0.86

How to fix CVE-2011-10020

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2011-10020. EPSS is 1.31%. Act only if a listed version of Kaillera Project Server is installed.

Which versions are affected?

Compare what you have installed with Kaillera Project Server 0 ≤0.86 0 ≤0.86. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.31%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 20, 2025 · EUVD

    Detected

    Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake. Once a client sends a valid HELLO0.83 packet and receives a response, any subsequent malformed packet causes the server to crash and become unresponsive. This flaw stems from improper input validation in the server’s UDP packet handler, allowing unaut

  2. May 15, 2026 · EUVD

    Updated

    Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake. Once a client sends a valid HELLO0.83 packet and receives a response, any subsequent malformed packet causes the server to crash and become unresponsive. This flaw stems from improper input validation in the server’s UDP packet handler, allowing unaut

Sources

  • CVE.orgVulnerability recordCVE-2011-10020

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2011-10020

    30-day exploitation probability 1.31%

    first.org
  • EUVDVulnerability recordEUVD-2011-5257

    Kaillera Server version 0.86 is vulnerable to a denial-of-service condition triggered by sending a malformed UDP packet after the initial handshake. Once a client sends a valid HELLO0.83 packet and receives a response, any subsequent malformed packet causes the server to crash an

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleauxiliary_dos/windows/games/kaillera

    Public module reference (normal). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.