Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2016-4437

CVE-2016-4437CRITICAL

n/a n/a — Apache Shiro

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .9304   99.8   YES

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  May 2   Reserved by redhat
  Jun 7   Published (CNA: redhat)
  Nov 3   Added to CISA KEV, remediation due 2022-05-03

CWE-321 · CNA: redhat · CVSS v3.1 · 8 references · KEV due May 3, 2022

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 2, 2016	Reserved	Reserved by redhat
June 7, 2016	Published	Published (CNA: redhat)
November 3, 2021	KEV ADDED	Added to CISA KEV, remediation due 2022-05-03

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-321

References (8)

http://packetstormsecurity.com/files/137310/Apache-Shiro-1.2.4-Information-Disclosure.html [x_refsource_MISC]
http://packetstormsecurity.com/files/157497/Apache-Shiro-1.2.4-Remote-Code-Execution.html [x_refsource_MISC]
http://rhn.redhat.com/errata/RHSA-2016-2035.html [vendor-advisory, x_refsource_REDHAT]
http://rhn.redhat.com/errata/RHSA-2016-2036.html [vendor-advisory, x_refsource_REDHAT]
http://www.securityfocus.com/archive/1/538570/100/0/threaded [mailing-list, x_refsource_BUGTRAQ]
http://www.securityfocus.com/bid/91024 [vdb-entry, x_refsource_BID]
https://lists.apache.org/thread.html/ef3a800c7d727a00e04b78e2f06c5cd8960f09ca28c9b69d94c3c4c4%40%3Cannouncements.aurora.apache.org%3E [mailing-list, x_refsource_MLIST]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4437 [government-resource]

Authoritative record: CVE-2016-4437 at cve.org

Weaknesses: CWE-321

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2016-4437 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.