November 3, 2021 · Applied Cybernetics Group
CVE-2016-4437 — Apache Shiro
Apache Shiro Code Execution Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Apache
- Product
- Shiro
- EPSS
- 99.8th percentile (score 0.930, as of
2026-07-13) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- ATT&CK
- T1059 , T1190 · signal rollup
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2016-4437
CISA short description
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.
Required action
Apply updates per vendor instructions.