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CVE-2021-45046

Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack

Published: Dec 14, 2021Updated: Oct 27, 2025 Sources: CVE List NVD GHSA BDUCWE-917

Description

Incomplete fix for Apache Log4j vulnerability

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
and 46 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:May 1, 2023
Remediation due:May 22, 2023
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

Official Patch Available
Workaround Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

and 35 more references View all →

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