CVE-2016-4437

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

93.03% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.8% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2016-06-07 14:00Z10 YR AGO

Last updated

2025-10-21 23:55Z1 YR AGO

Reserved

2016-05-02

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-321Use of Hard-coded Cryptographic KeyVariant
• CWE-287Improper AuthenticationClass

Data version

5.1

Document digest

d7645785d838b39eb8a7c10dde7bc9889c5d3ab5b1a8cc4c524703d0b1d0c869

• rhn.redhat.comRHSA-2016:2035http://rhn.redhat.com/errata/RHSA-2016-2035.htmlvendor-advisoryx_refsource_REDHAT
• lists.apache.org[announcements@aurora.apache.org] 20171101 Apache Aurora information disclosure vulnerabilityhttps://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3Emailing-listx_refsource_MLIST
• packetstormsecurity.comhttp://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.htmlx_refsource_MISC
• rhn.redhat.comRHSA-2016:2036http://rhn.redhat.com/errata/RHSA-2016-2036.htmlvendor-advisoryx_refsource_REDHAT
• www.securityfocus.com91024http://www.securityfocus.com/bid/91024vdb-entryx_refsource_BID
• www.securityfocus.com20160603 [Announce] CVE-2016-4437: Apache Shiro information disclosure vulnerabilityhttp://www.securityfocus.com/archive/1/538570/100/0/threadedmailing-listx_refsource_BUGTRAQ
• packetstormsecurity.comhttp://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.htmlx_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437government-resource