Is CVE-2016-4437 actively exploited?

Yes. CVE-2016-4437 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2016-4437 be exploited remotely?

The attack vector of CVE-2016-4437 has not been classified yet.

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

CVE-2016-4437 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2016-4437

HIGHCISA KEVIN THE WILD

CVE-2016-4437

Published: November 3, 2021

EPSS:94.21%probability of exploitation in 30 daysPercentile:99.9th

Official 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.

NVD Source

CISA KEV Advisory

Apache Shiro Code Execution Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Apache Shiro has a vulnerability that allows remote attackers to execute code or bypass access restrictions if the 'remember me' feature's cipher key is not configured. With an EPSS score of 0.94214 and inclusion in the KEV, this flaw is highly likely to be exploited.

This vulnerability is actively exploited in the wild. The ability to execute code or bypass access restrictions remotely makes it a significant threat.

Recommended Action

Ensure that a strong, unique cipher key is configured for the 'remember me' feature in Apache Shiro. Apply any available patches or updates for Apache Shiro to mitigate this vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2016-4437 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2016-4437 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.