Palo Alto Failed To Fetch Device Certificate Tpm Public Key Match Failed May 2026

Lower the management interface MTU to avoid packet fragmentation issues.

Incorrect Management Interface MTU sizes (often needing a reduction to 1374 ) can cause the TLS handshake with the CSP to fail midway. Lower the management interface MTU to avoid packet

In rare cases, a failed previous fetch or a software bug can leave "stale" certificate fragments in the firewall's internal storage, blocking new generation attempts. If a device is replaced via RMA, the

If a device is replaced via RMA, the new hardware has a different TPM (Trusted Platform Module) chip with unique keys that may not yet be synced with the serial number in the Palo Alto Customer Support Portal . Log in to the

Before moving to advanced hardware fixes, ensure the device can actually reach the Palo Alto servers.

If the error persists, try clearing the local telemetry cache and forcing a refresh: Run the following commands in the CLI:

If the automatic process fails, you can trigger a manual fetch using a One-Time Password (OTP) from the Support Portal. Log in to the . Navigate to Products > Device Certificates . Select your device serial number and click Generate OTP . On your firewall CLI, run: request certificate fetch otp Use code with caution.