CVE-2016-3081: Apache Struts

What is CVE-2016-3081?

Apache Struts 2.3.19 to 2.3.20.2, 2.3.21 to 2.3.24.1, and 2.3.25 to 2.3.28, when Dynamic Method Invocation is enabled, allow remote attackers to execute arbitrary code via method: prefix, related to chained expressions.

CVSS8.1 NVD 3.1

SeverityHIGH

Exploitation In the wild In CISA KEV

EPSS93% · P100

Triage statusActive Exploit

ActionPatch immediately

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWECWE-77

NVD published2016-04-26

NVD last modified2026-10-09

Timeline

2016-04-26Published to the U.S. National Vulnerability Database (NVD)
2026-10-08Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-10-09NVD record last updated
2026-10-11CISA federal remediation deadline (BOD 22-01)

CISA Known Exploited Vulnerability

Apache Struts Command Injection Vulnerability

Added to KEV2026-10-08

Federal patch deadline2026-10-11

Known ransomware useUnknown

Affected product

Apache Struts

NVD also lists CPE entries for: Apache Struts, Oracle Siebel E-Billing

Remediation Steps

Apply the vendor security update for Apache Struts as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of October 2026 (October 5 – 11)

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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.