CVE entry · CVE-2016-3081
CVE-2016-3081: Apache Struts Command Injection Vulnerability
Apache Struts contains a command injection vulnerability that could allow remote attackers to execute arbitrary code via method:prefix when Dynamic Method Invocation is enabled.
- Actively exploited: added to CISA’s KEV catalog on October 8, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: October 11, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Apache Struts, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.