Apr 08, 2026 • Bill Toulas
13-year-old bug in ActiveMQ lets hackers remotely execute commands
Security researchers have identified a critical remote code execution vulnerability in Apache ActiveMQ Classic that has existed undetected for 13 years. This...
Executive Summary
Security researchers have identified a critical remote code execution vulnerability in Apache ActiveMQ Classic that has existed undetected for 13 years. This flaw allows unauthenticated remote attackers to execute arbitrary commands on affected systems, potentially leading to complete system compromise, data exfiltration, and lateral movement within networks. The vulnerability poses an extreme risk to organizations running vulnerable versions of ActiveMQ Classic. Immediate remediation actions include isolating affected systems from network access, implementing network segmentation, and applying official patches from Apache once released. Organizations should conduct forensic analysis to determine if any exploitation has occurred during the 13-year window. Priority patching is essential given the severity and ease of exploitation.
Summary
Security researchers discovered a remote code execution (RCE) vulnerability in Apache ActiveMQ Classic that has gone undetected for 13 years and could be exploited to execute arbitrary commands. [...]
Published Analysis
Security researchers have identified a critical remote code execution vulnerability in Apache ActiveMQ Classic that has existed undetected for 13 years. This flaw allows unauthenticated remote attackers to execute arbitrary commands on affected systems, potentially leading to complete system compromise, data exfiltration, and lateral movement within networks. The vulnerability poses an extreme risk to organizations running vulnerable versions of ActiveMQ Classic. Immediate remediation actions include isolating affected systems from network access, implementing network segmentation, and applying official patches from Apache once released. Organizations should conduct forensic analysis to determine if any exploitation has occurred during the 13-year window. Priority patching is essential given the severity and ease of exploitation. Security researchers discovered a remote code execution (RCE) vulnerability in Apache ActiveMQ Classic that has gone undetected for 13 years and could be exploited to execute arbitrary commands. [...] Security researchers discovered a remote code execution (RCE) vulnerability in Apache ActiveMQ Classic that has gone undetected for 13 years and could be exploited to execute arbitrary commands. [...]