Romford-based firm Clemence Hoar Cummings (CHC) is urging business owners not to panic after a technical problem affected the Companies House website.
The IT breach allegedly made it possible for users to access information about other companies registered with Companies House due to a glitch in the system.
This meant that unauthorised filings, such as accounts or changes of director, could be made to another company’s records at will.
Companies House said it was made aware of the security issue on 13 March 2026 and it had been resolved by 16 March 2026.
However, reports indicate that the issue was introduced during a system update in October 2025, so it is unclear how long unauthorised access may have been possible.
David Belbin, Director at CHC says, “The important thing for businesses right now is that they don’t panic. Companies House has confirmed that passwords were not compromised, identity verification data remained secure and there was no ability to alter filed documents.
“There is also no indication that this issue enabled large-scale data extraction, which will be reassuring for those concerned about wider data exposure.
“Although we are yet to hear of any confirmed cases of unauthorised access or amendments, I would encourage company directors to log in to Companies House and review their registered details and filing history carefully, checking that both current and historic records remain accurate and consistent.”
“If there is any uncertainty around the integrity of your filings, our team is available to support businesses with any questions or concerns stemming from this incident.”
CHC has been helping clients across Essex for 100 years, providing services including accountancy, business development advice, tax compliance and wealth planning.
For further support relating to the Companies House breach, contact us.