PowerChute has been flagged as vulnerable to CVE-2026-34477, CVE-2026-34478, CVE-2026-34479, CVE-2026-34480

Question

Accepted Answer

Issue:

PowerChute has been flagged as vulnerable to CVE-2026-34477, CVE-2026-34478, CVE-2026-34479, CVE-2026-34480

Product Lines:

PowerChute Network Shutdown 5.2

PowerChute Serial Shutdown 1.5

Environment:

All supported Operating Systems

Cause:

PowerChute ships with a version of log4j that is less than log4j 2.25.4

Solution:

For PowerChute Network Shutdown version 5.2 on Windows

Download the attached zip file "PCNS52_Log4j_update.zip", uncompress the zip file.
Open a command prompt as an administrator.
Change directory to the PCNS52_Log4j_Update folder that was created when uncompressing PCNS52_Log4j_update.zip.
Enter the command .\run_update.cmd.

For PowerChute Network Shutdown version 5.2 on Linux

Download the attached log4j-2.26.1.tar file, and if needed, copy the file to the Linux system.
Uncompress the log4j-2.26.1.tar file. The command is tar -xvf log4j-2.26.1.tar.
Stop the PowerChute service. The command is systemctl stop PowerChute
Change directory to the PowerChute lib directory. The default path is /opt/APC/PowerChute/group1/lib
Move the log4j2 files to the APC directory. If PowerChute resides in the default path, the command is mv /opt/APC/PowerChute/group1/lib/log4j2* /opt/APC
Change directory to the log4j-2.26.1 directory that was created when you uncompressed the tar file.
Copy the log4j-api-2.26.1jar, log4j-core-2.26.1.jar, log4j-slf4j-impl-2.26.1.jar to the PowerChute lib directory that resides where PowerChute resides. If PowerChute resides in the default path, the command is cp log4j2* /opt/APC/PowerChute/group1/lib
Start the PowerChute service. The command is systemctl start PowerChute

For PowerChute Serial Shutdown version 1.5 on Windows

Download the attached zip file "PCSS_Log4j_Update", uncompress the zip file.
Open a command prompt as an administrator.
Change directory to the PCSS_Log4j_Update folder that was created when uncompressing PCSS_Log4j_update.zip.
Enter the command .\run_update.cmd.

For PowerChute Serial Shutdown version 1.5 on Linux

Download the attached log4j-2.26.1.tar file, and if needed, copy the file to the Linux system.
Uncompress the file. The command is tar -xvf log4j-2.26.1.tar.
Stop the PowerChute service. The command is systemctl stop PBEAgent
Change directory to where PowerChute has been installed. The default path is /opt/APC/PowerChuteSerialShutdown/Agent/
Move the current log4j files. If PowerChute was installed to the default path, the command is mv /opt/APC/PowerChuteSerialShutdown/Agent/lib/log4j* /opt/APC
Change directory to the log4j-2.2.6.1 directory that was created when log4j-2.26.1.tar was uncompressed.
Copy the new logj4 files to the PowerChute lib directory. If PowerChute was installed to the default path, the command is cp log4j.* /opt/APC/PowerChuteSerialShutdown/Agent/lib
Restart the PowerChute service. The command is systemctl start PBEAgent

Released for: Schneider Electric Australia