Many computer systems in Western Australia's public service are at risk from hackers because of weak passwords.

Auditor General Caroline Spencer tabled her annual Information Systems Audit Report in parliament on Tuesday, which included an in-depth assessment of password use at 17 agencies.

Information systems were vulnerable, she concluded, with weak passwords set for more than one quarter of the enabled network accounts.

Passwords starting with Password, or 12345 are the two top hacked security passwords. Credit:Reuters

In several instances, the accounts were used to access critical agency systems and information via remote access without any additional controls.