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Vulnerabilities

Vulnerability · CVE-2012-3546

org/apache/catalina/realm/RealmBase.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when FORM authentication is used, allows remote attackers to bypass…

Published Dec 19, 2012 · catalog updated Jun 16, 2026 · the affected product

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2012-3546 is not in CISA KEV. FIRST estimates a 11.97% 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
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
11.97%
Remediation
Advisory link
Affected products
cpe apache/tomcat

org/apache/catalina/realm/RealmBase.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when FORM authentication is used, allows remote attackers to bypass security-constraint checks by leveraging a previous setUserPrincipal call and then placing /j_security_check at the end of a URI.

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/tomcat6.0
  • cpe apache/tomcat6.0.0
  • cpe apache/tomcat6.0.1
  • cpe apache/tomcat6.0.2

How to fix CVE-2012-3546

What to do

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

Should you patch?

CVE-2012-3546 is not in CISA KEV. FIRST estimates a 11.97% 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 6.0, 6.0.0, 6.0.1, 6.0.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-264. EPSS 11.97%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. 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. Dec 19, 2012 · Monitored products — critical

    Detected

    org/apache/catalina/realm/RealmBase.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when FORM authentication is used, allows remote attackers to bypass security-constraint checks by leveraging a previous setUserPrincipal call and then placing /j_security_check at the end of a URI.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    org/apache/catalina/realm/RealmBase.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when FORM authentication is used, allows remote attackers to bypass security-constraint checks by leveraging a previous setUserPrincipal call and then placing /j_security_check at the end of a URI.

Sources

  • CVE.orgVulnerability recordCVE-2012-3546

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2012-3546

    30-day exploitation probability 11.97%

    first.org
  • Monitored products — criticalVendor advisoryCVE-2012-3546

    org/apache/catalina/realm/RealmBase.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.30, when FORM authentication is used, allows remote attackers to bypass security-constraint checks by leveraging a previous setUserPrincipal call and then placing /j_security_check at the end of a URI.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 3, 2026