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CVE-2006-1547 Apache CVE debrief

CVE-2006-1547 is a denial-of-service vulnerability associated with Apache Struts 1 ActionForm. CISA lists it in the Known Exploited Vulnerabilities catalog, which means it has been identified as actively exploited in the wild. Organizations still running Struts 1 should treat this as a high-priority legacy application risk and follow vendor update guidance immediately.

Vendor
Apache
Product
Struts 1
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-01-21
Original CVE updated
2022-01-21
Advisory published
2022-01-21
Advisory updated
2022-01-21

Who should care

Security teams, application owners, and operations teams responsible for any legacy Apache Struts 1 deployments should care most. This is especially important for internet-facing applications and systems where availability is critical.

Technical summary

The vulnerability is identified as an Apache Struts 1 ActionForm denial-of-service issue. The available official records in this corpus do not provide exploit mechanics or affected-version details, but CISA’s KEV listing confirms known exploitation. The required defensive action in the KEV record is to apply updates per vendor instructions.

Defensive priority

High. Because this vulnerability is in CISA KEV, it should be treated as an urgent remediation item, particularly for any exposed or business-critical Struts 1 application.

Recommended defensive actions

  • Inventory all applications and services that use Apache Struts 1.
  • Confirm whether any Struts 1 deployments are internet-facing or support critical business functions.
  • Apply vendor-recommended updates or remediation steps as soon as possible.
  • If immediate patching is not possible, reduce exposure by restricting access and placing the system behind compensating controls.
  • Track remediation to completion and verify that the vulnerable component is no longer present.

Evidence notes

CISA’s Known Exploited Vulnerabilities catalog lists CVE-2006-1547 as "Apache Struts 1 ActionForm Denial-of-Service Vulnerability" and specifies the required action: "Apply updates per vendor instructions." The official CVE and NVD records provide the vulnerability identifier and reference record for confirmation.

Sources and references

Verified primary and authoritative sources

  • CVE-2006-1547 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2006-1547

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2006-1547 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2006-1547

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.