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Vulnerabilities

Vulnerability · CVE-2010-2227

Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to…

Published Jul 13, 2010 · catalog updated Jun 16, 2026 · the affected product

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2010-2227 is not in CISA KEV. FIRST estimates a 54.78% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
54.78%
Remediation
Advisory link
Affected products
cpe apache/tomcat

Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to cause a denial of service (application outage) or obtain sensitive information via a crafted header that interferes with "recycling of a buffer."

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.

  • cpe apache/tomcat5.5.0
  • cpe apache/tomcat5.5.1
  • cpe apache/tomcat5.5.2
  • cpe apache/tomcat5.5.3
  • cpe apache/tomcat5.5.4
  • cpe apache/tomcat5.5.5

How to fix CVE-2010-2227

What to do

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

Should you patch?

CVE-2010-2227 is not in CISA KEV. FIRST estimates a 54.78% chance of exploitation in the next 30 days. Check whether you run the affected product.

Which versions are affected?

Compare what you have installed with 5.5.0, 5.5.1, 5.5.2, 5.5.3, 5.5.4, 5.5.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-119: Buffer Overflow. EPSS 54.78%. 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.

Technology hubs

Apache Tomcat security

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. Jul 13, 2010 · Monitored products — critical

    Detected

    Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to cause a denial of service (application outage) or obtain sensitive information via a crafted header that interferes with "recycling of a buffer."

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to cause a denial of service (application outage) or obtain sensitive information via a crafted header that interferes with "recycling of a buffer."

Sources

  • FIRST EPSSExploitation probabilityCVE-2010-2227

    30-day exploitation probability 54.78%

    first.org
  • Monitored products — criticalVendor advisoryCVE-2010-2227

    Apache Tomcat 5.5.0 through 5.5.29, 6.0.0 through 6.0.27, and 7.0.0 beta does not properly handle an invalid Transfer-Encoding header, which allows remote attackers to cause a denial of service (application outage) or obtain sensitive information via a crafted header that interferes with "recycling of a buffer."

    nvd.nist.gov
  • Metasploit ModulesPublic exploit moduleauxiliary_dos/http/apache_tomcat_transfer_encoding

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

    rapid7.com
  • Metasploit ModulesPublic exploit moduleauxiliary_dos/http/slowloris

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

    rapid7.com

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • Metasploit ModulesNov 3, 2026
  • Metasploit ModulesNov 3, 2026
  • Monitored products — criticalNov 3, 2026