Apache Struts Command Injection Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Struts, fix it now.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
US federal civilian agencies must remediate by Oct 11, 2026.
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
| Product | Vendor | Affected versions | Source |
|---|---|---|---|
| Struts | Apache Software Foundation | 2.0.0; 2.0.1; 2.0.2; 2.0.3; 2.0.4; 2.0.5 | KEV |
Sources: KEV = CISA Known Exploited Vulnerabilities catalog.
Developments from the last 30 days, newest first.
CVE-2016-3081 scored CVSS 8.1: Apache Struts, Apache Struts Command Injection Vulnerability
CISA lists this as exploited in the wild. Unpatched Struts systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch released for CVE-2016-3081: Apache Struts, Apache Struts Command Injection Vulnerability
An official fix is now available for Apache Struts. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
CVE-2016-3081 added to CISA KEV: Apache Struts, Apache Struts Command Injection Vulnerability
CISA lists this as exploited in the wild. Unpatched Struts systems are exposed to active attacks now.
Basis: CISA Known Exploited Vulnerabilities catalog
CISA lists this as exploited in the wild. Unpatched Struts systems are exposed to active attacks now.
Apply the vendor's security update for Struts.
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Exchange Server and Struts systems are exposed to active attacks now.
Treat this as an emergency.
