ACTIVELY EXPLOITED
CVE-2016-4437: Apache Shiro Code Execution Vulnerability
| Vendor | Apache |
|---|---|
| Product | Shiro |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Nov 2021 |
| CISA federal deadline | 3 May 2022 |
| Weakness (CWE) | CWE-284 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Apache Shiro contains a vulnerability which may allow remote attackers to execute code or bypass intended access restrictions via an unspecified request parameter when a cipher key has not been configured for the "remember me" feature.
SOURCES
Other Apache flaws
- CVE-2016-3081: Apache Struts Command Injection Vulnerability
- CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
- CVE-2026-34197: Apache ActiveMQ Improper Input Validation Vulnerability
- CVE-2024-38475: Apache HTTP Server Improper Escaping of Output Vulnerability
- CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.