What is the CVSS score of CVE-2016-4437?

CVE-2016-4437 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 94.2%.

Is there a public PoC exploit available for CVE-2016-4437?

Yes, a public proof-of-concept exploit is available for CVE-2016-4437. Prioritise patching immediately. EPSS: 94.2%.

Is there a patch available for CVE-2016-4437?

Yes, a patch is available for CVE-2016-4437. Update the affected software to the latest version immediately.

Apache CVE-2016-4437

CRITICAL

Use of Hard-coded Cryptographic Key (CWE-321)

2016-06-07 secalert@redhat.com

Apache RCE

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Apr 21, 2026 - 15:31 CISA

CVE Published

Jun 07, 2016 - 14:06 cve.org

CRITICAL 9.8

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

266 maven packages depend on org.apache.shiro:shiro-core (29 direct, 237 indirect)

Ecosystem-wide dependent count for version 1.2.5.

DescriptionCVE.org

AnalysisAI

Apache Shiro before 1.2.5, when a cipher key has not been configured for the "remember me" feature, allows remote attackers to execute arbitrary code or bypass intended access restrictions via an. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-321. Apache Shiro before 1.2.5, when a cipher key has not been configured for the "remember me" feature, allows remote attackers to execute arbitrary code or bypass intended access restrictions via an unspecified request parameter. Affected products include: Apache Aurora, Apache Shiro, Redhat Fuse, Redhat Jboss Middleware Text-Only Advisories. Version information: before 1.2.5.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.