A whistleblower disclosed that the Commission received an automatic failure during a Cyber Essentials audit. Last month, it was revealed that "hostile actors" had infiltrated the Commission's emails, potentially compromising the data of 40 million voters.

According to a Commission spokesperson, the organization has not yet managed to pass this basic security test. In August of 2021, the election watchdog disclosed that hackers had infiltrated their IT systems, maintaining access to sensitive information until their detection and removal in October 2022. 

The unidentified attackers gained access to Electoral Commission email correspondence and potentially viewed databases containing the names and addresses of 40 million registered voters, including millions not on public registers.

The identity of the intruders and the method of breach have not yet been disclosed. However, it has now been revealed by a whistleblower that in the same month as the intrusion, the Commission received notification from cyber-security auditors that it was not in compliance with the government-backed Cyber Essentials scheme. 

Although participation in Cyber Essentials is voluntary, it is widely adopted by organizations to demonstrate their commitment to security to customers. For organizations bidding on contracts involving sensitive information, the government mandates holding an up-to-date Cyber Essentials certificate. In 2021, the Commission faced multiple deficiencies in their attempts to obtain certification. 

A Commission spokesperson acknowledged these shortcomings but asserted they were unrelated to the cyber-attack affecting email servers.

One of the contributing factors to the failed test was the operation of around 200 staff laptops with outdated and potentially vulnerable software. The Commission was advised to update its Windows 10 Enterprise operating system, which had become outdated for security updates months earlier. 

Auditors also cited the use of old, unsupported iPhones by staff for security updates as a reason for the failure. The National Cyber Security Centre (NCSC), an advocate for the Cyber Essentials scheme, advises all organizations to keep software up to date to prevent exploitation of known vulnerabilities by hackers.

Cyber-security consultant Daniel Card, who has assisted numerous organizations in achieving Cyber Essentials compliance, stated that it is premature to determine whether the identified failures in the audit facilitated the hackers' entry. 

He noted that initial signs suggest the hackers found an alternative method to access the email servers, but there is a possibility that these inadequately secured devices were part of the attack chain.

Regardless of whether these vulnerabilities played a role, Card emphasized that they indicate a broader issue of weak security posture and likely governance failures. The NCSC emphasizes the significance of Cyber Essentials certification, noting that vulnerability to basic attacks can make an organization a target for more sophisticated cyber-criminals.

The UK's Information Commissioner's Office, which holds both Cyber Essentials and Cyber Essentials Plus certifications, stated it is urgently investigating the cyber-attack. When the breach was disclosed, the Electoral Commission mentioned that data from the complete electoral register was largely public. 

However, less than half of the data on the open register, which can be purchased, is publicly available. Therefore, the hackers potentially accessed data of tens of millions who had opted out of the public list.

The Electoral Commission confirmed that it did not apply for Cyber Essentials in 2022 and asserted its commitment to ongoing improvements in cyber-security, drawing on the expertise of the National Cyber Security Centre, as is common practice among public bodies.