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CVE-2026-4638

Plaintext Password Disclosure via VBScript Sensor Error Message in Paessler PRTG Network Monitor PUBLISHED

Description (CNA)

PRTG Network Monitor before version 26.2.120.1449 ships a demo EXE/Script sensor that multiplies two integer parameters using cscript.exe. If a non-numeric value is passed instead, cscript.exe raises a 'Type mismatch' runtime error that includes the offending parameter value in plaintext. PRTG provides a documented placeholder variable, %windowspassword, which resolves to the configured Windows/domain password used by PRTG and can be passed as a sensor parameter.  Any PRTG user who is not restricted to read-only access and is permitted to create sensors (the default for non-read-only users) can pass %windowspassword as an argument to the demo VBScript sensor, triggering the type-mismatch error and causing PRTG to display the plaintext password in the sensor's error output.

Affected (CNA)

Vendor / productVersions
Paessler GmbH / PRTG Network Monitoraffected 0 before 26.2.120.1449

CWE

CWE-209

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.