HOMEVULNERABILITIESCVE-2021-26118
HIGH

CVE-2021-26118

CWE-284Published: January 27, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

While investigating ARTEMIS-2964 it was found that the creation of advisory messages in the OpenWire protocol head of Apache ActiveMQ Artemis 2.15.0 bypassed policy based access control for the entire session. Production of advisory messages was not subject to access control in error.

NVD Source

Technical Analysis

CVE-2021-26118 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

Apache1 product(s)
artemis
netapp1 product(s)
oncommand workflow automation
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://mail-archives.apache.org/mod_mbox/activemq-users/202101.mbox/%3CCAH%2BvQmMUNnkiXv2-d3ucdErWOsdnLi6CgnK%2BVfixyJvTgTuYig%40mail.gmail.com%3E
ADVISORYhttps://security.netapp.com/advisory/ntap-20210827-0002/
ADVISORYhttps://mail-archives.apache.org/mod_mbox/activemq-users/202101.mbox/%3CCAH%2BvQmMUNnkiXv2-d3ucdErWOsdnLi6CgnK%2BVfixyJvTgTuYig%40mail.gmail.com%3E
ADVISORYhttps://security.netapp.com/advisory/ntap-20210827-0002/

All References (6)

→
https://lists.apache.org/thread.html/rafd5d7cf303772a0118865262946586921a65ebd98fc24f56c812574%40%3Cannounce.apache.org%3E
→
https://mail-archives.apache.org/mod_mbox/activemq-users/202101.mbox/%3CCAH%2BvQmMUNnkiXv2-d3ucdErWOsdnLi6CgnK%2BVfixyJvTgTuYig%40mail.gmail.com%3EMailing List · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210827-0002/Third Party Advisory
→
https://lists.apache.org/thread.html/rafd5d7cf303772a0118865262946586921a65ebd98fc24f56c812574%40%3Cannounce.apache.org%3E
→
https://mail-archives.apache.org/mod_mbox/activemq-users/202101.mbox/%3CCAH%2BvQmMUNnkiXv2-d3ucdErWOsdnLi6CgnK%2BVfixyJvTgTuYig%40mail.gmail.com%3EMailing List · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210827-0002/Third Party Advisory

Quick Facts

CVE IDCVE-2021-26118
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-284
CISA KEVNo
Affected2 vendor(s)
PublishedJan 27, 2021

Related CVEs (CWE-284)

CVE-2026-48907
KEV10.0
CVE-2026-48939
KEV10.0
CVE-2021-38454
10.0
CVE-2022-32158
10.0
CVE-2020-12030
10.0
CVE-2026-48908
KEV10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-26118 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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