IEH Corp disclosed a cybersecurity incident

What the company disclosed

On August 4, 2026, IEH Corporation ("IEH" or the "Company") discovered that it sustained a cybersecurity incident whereby a threat actor using an alias gained unauthorized access to the Microsoft 365 mailbox of an employee of the Company. As soon as the incident was observed, the Company took action to contain the unauthorized access.

An investigation determined the compromise originated from a phishing attack in which a malicious actor impersonated a prospective business contact and delivered a hyperlink disguised as a Microsoft document-sharing link. The user accessed the link and entered Microsoft 365 credentials into a fraudulent login page, resulting in unauthorized account access.

The threat actor gained access to mailbox contents, including email messages, attachments, customer communications, purchase orders, engineering-related documentation, and potentially export-controlled technical information. No evidence currently exists that unauthorized emails were transmitted from the account or that data was successfully exfiltrated. However, sensitive information was accessible to the unauthorized party during the compromise period.

The account was secured, malicious mailbox rules were disabled, evidence was preserved, and corrective actions are underway.

Following containment and investigation activities, the Company initiated a review of account security controls and authentication protections applicable to Microsoft 365 services. The Company has already taken and completed a series of corrective actions to contain any impact of the unauthorized access.

However, at this time, the Company has no evidence that information was transmitted externally, downloaded or infiltrated. The Company only knows that the information was accessible to the unauthorized actor during the compromise period.

The Company is continuing to review the impacted communications and will provide, if necessary, any required notifications to affected parties and applicable regulatory agencies.

As of the date of this filing on Form 8-K, the Company believes that the incident will not have a material adverse effect on its business operations. The Company is continuing to investigate the incident.

Cautionary Statement Regarding Forward Looking Statements

Certain of the statements included in this Report constitute forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements are made based on management's current expectations and beliefs concerning future developments and their potential effects upon the Company and its subsidiaries. The Company's actual results may differ, possibly materially, from expectations or estimates reflected in such forward-looking statements. Certain important factors that could cause actual results to differ, possibly materially, from expectations or estimates reflected in such forward-looking statements can be found in the "Risk Factors" and "Forward-Looking Statements" sections included in the Company's Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q. The Company does not undertake to update any particular forward-looking statement included in this document.

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Quoted from the company’s own Form 8-K, Item 1.05, as filed with the US Securities and Exchange Commission. SEC filings are works of the US federal government and are in the public domain.