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CVE-2021-26117

ActiveMQ: LDAP-Authentication does not verify passwords on servers with anonymous bind

Published: Jan 27, 2021Updated: Jun 15, 2026 Sources: CVE List NVD GHSACWE-287
NVD MITRE
7.5CVSSHIGH
EPSS Score
11.2%
Top 4.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

Description

The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. In this case, for Apache ActiveMQ Artemis prior to version 2.16.0 and Apache ActiveMQ prior to versions 5.16.1 and 5.15.14, the anonymous context is used to verify a valid users password in error, resulting in no check on the password.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-287

Affected Products

activemqapache
LibraryLibrary
OSS Libraries / generic-library
artemisapache
On-premDatabase
Databases / cache-message-queue
oncommand workflow automationnetappHardware Firmware
debian linuxdebian
On-premOS
Operating Systems / linux-distro
communications element manageroracle
On-prem
Communications
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
netappcommercialUSHardware Firmware
debianoss-projectGBOperating Systemsaka debian gnu/linux
oraclecommercialUSDatabasesaka oracle corp.
and 6 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://lists.apache.org/thread.html/r110cacfa754471361234965ffe851a046e302ff2693b055f49f47b02%40%3Cissues.activemq.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/r22cdc0fb45e223ac92bc2ceff7af92f1193dfc614c8b248534456229%40%3Cissues.activemq.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/r3341d96d8f956e878fb7b463b08d57ca1d58fec9c970aee929b58e0d%40%3Cissues.activemq.apache.org%3E
lists.apache.org
and 39 more references View all →

Timeline

Published
Jan 27, 2021
Last Updated
Jun 15, 2026

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