Cambium Networks Corp

Evaluation of disclosure controls and procedures

Our management, with the participation of our principal executive officer and interim principal financial officer, has evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities and Exchange Act of 1934, as amended, or the Exchange Act), as of September 30, 2025, the end of the period covered by this Quarterly Report on Form 10-Q. Based on such evaluation, our principal executive officer and interim principal financial officer have concluded that, as of such date, our disclosure controls and procedures were not effective because of material weaknesses in our internal control over financial reporting, previously reported in Part II, Item 9A of our Comprehensive Form 10-K for the year ended December 31, 2024.

Material Weaknesses

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of our financial statements will not be prevented or detected on a timely basis.

As disclosed in Item 9A of our Comprehensive Form 10-K for the year ended December 31, 2024, management identified the following material weaknesses in internal controls over financial reporting during the year ended December 31, 2024:

Competency. We did not have sufficient technical accounting expertise and competency within the finance function to appropriately apply U.S. GAAP to complex and non-routine transactions. Specifically, we did not maintain adequate personnel with the appropriate level of knowledge, experience and training to (i) identify accounting issues requiring specialized judgment, (ii) research and interpret relevant accounting guidance, and (iii) design and execute effective controls over the accounting for such transactions. As a result, certain controls designed to prevent or detect misstatements in a timely manner were not operating effectively.

Accounting policies and procedures. We did not maintain effective controls over financial reporting related to the design and adequacy of our accounting policies and procedures supporting the identification, estimation, and recording of certain significant accounting estimates, specifically, those related to the evaluation of excess and obsolete inventory, the estimation of expected credit losses, classification of certain supplier prepayments made as current or noncurrent assets and classification of loss on supplier commitment liability as current or noncurrent liabilities; the identification and accounting for variable consideration, and processes and procedures to identify and assess the accounting of non-standard revenue contracts and related terms. Our accounting policies did not provide adequate guidance to ensure that these matters were consistently identified, evaluated and accounted for in accordance with U.S. GAAP, or that changes in relevant facts and circumstances were appropriately reflected in management's accounting conclusions.

Information technology general controls. We did not maintain effective controls related to the design and operating effectiveness of information technology general controls over systems supporting financial reporting, including controls over logical access, program change management, and information technology operations. These information technology general control deficiencies impacted management's ability to rely on certain automated controls and system-generated reports.

Rebates and returns. We did not maintain effective controls over our rebate and returns programs to ensure they completely identified relevant contract terms and program features were appropriately evaluated, and that rebate and returns accruals were estimated using reasonable and supportable assumptions that reflect expected customer behavior and historical experience as required under ASC 606, Revenue from Contracts with Customers. In addition, controls were not sufficiently precise to ensure that changes in rebate programs, pricing arrangements, sales trends, channel inventory amounts, and other relevant inputs were timely incorporated into the estimation of variable consideration.

Excess and obsolete inventory. We did not maintain effective controls over financial reporting related to the identification, estimation and recording of excess and obsolete inventory reserves for finished goods and component inventory. Specifically, we did not design and maintain effective controls to ensure that inventory items that were excess, slow-moving, or obsolete were identified timely and appropriately evaluated based on remaining lifetime demand, product life cycles, customer requirements, and technological changes. In addition, controls were not sufficiently designed or operating effectively to ensure that inventory reserve estimates were developed using reasonable and supportable assumptions, including consideration of historic sales or usage and remaining lifetime demand.

Impairment accounting. We did not maintain effective controls over the timely identification of impairment triggering events or the proper evaluation and recording of impairments related to goodwill, intangible assets, and long-lived assets in accordance with ASC 350, Intangibles - Goodwill and Other, and ASC 360, Property, Plant and Equipment. Specifically, we did not ensure that events or changes in circumstances indicating that the carrying amounts of reporting units, asset groups, or individual long-lived assets may not be recoverable were identified and assessed on a timely basis. Additionally, controls were not adequately designed or operating effectively to ensure that, upon identification of a triggering event, appropriate qualitative and quantitative impairment analyses were performed and that any resulting impairment charges were accurately measured and recorded in the appropriate reporting period.

Income taxes. We did not maintain effective controls over the identification, evaluation, and timely recording of valuation allowances in accordance with ASC 740, Income Taxes. Specifically, controls were not designed or operating effectively to ensure that all available positive and negative evidence relevant to the realizability of deferred tax assets was appropriately identified, evaluated, and monitored on a timely basis. Additionally, we did not maintain effective controls to ensure that changes in facts and circumstances affecting the realizability of deferred tax assets were consistently incorporated into management's conclusions regarding the need for, and amount of, a valuation allowance, or that resulting deferred tax balances were recorded in the appropriate reporting period.

Classification of prepaid supplier payments and loss on commitment liability. We did not maintain effective controls over our classification of prepaid supplier payments and loss on supplier commitment liability. Specifically, controls were not designed or operating effectively to ensure that relevant, available and knowable information was adequately used to determine the appropriate noncurrent portion of the supplier prepayments and loss on supplier commitment liability.

Estimate of the allowance for credit losses. We did not maintain effective controls over the evaluation and timely recording of bad debt expense. Specifically, controls were not designed or operating effectively to ensure that certain adjustments to accounts receivable were recorded on a timely basis in the appropriate reporting period.

Ongoing Remediation Efforts to Address the Previously Identified Material Weaknesses

Management, with oversight from the Audit Committee of our Board of Directors, is taking steps to remediate the material weaknesses described above by implementing changes to our internal control over financial reporting. Management is in the process of enhancing, and will continue to enhance, the risk assessment process and design and implementation of internal controls over financial reporting. The remediation measures to correct the previously identified material weaknesses include, but are not limited to, the efforts summarized below:

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Hiring additional personnel and/or continuing to engage contractors and third-party advisors with technical accounting expertise and competency to appropriately apply U.S. GAAP to complex and non-routine transactions.

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Enhancing monitoring of user access and change management by performing comprehensive review of user roles and permissions.

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Implementing enhanced controls over the calculation of the estimate for incentives associated with distributor rebates, particularly as it relates to the completeness and accuracy of the information produced by the entity (IPE) and assumptions used in developing the estimate of future rebates to be issued, as well as control over the information produced, including spreadsheets, reports and data by our IT systems, to develop these estimates.

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Implementing enhanced controls over the calculation of estimate for sales returns, particularly as it relates to the assumptions used in the estimate of returns to be received.

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Enhancing or designing and implementing controls over the completeness and accuracy of information used in financial forecasts used to calculate the estimate of excess and obsolete inventory and impairment analysis, particularly as it relates to our assessment of underlying assumptions about demand for our products, together with procedures and documentation to corroborate our assessment of the underlying assumptions about demand for our products.

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Enhancing or designing and implementing controls over the accounting for income taxes to ensure the appropriate recording of deferred income taxes, deferred tax valuation allowances and related disclosures. Also, engaging a third-party advisor to assist management in making improvements to our evaluation and documentation of accounting for deferred tax valuation allowances.

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Enhancing or designing and implementing controls over the completeness and accuracy of information used in our assessment to determine the appropriate noncurrent portion of the supplier prepayments and loss on supplier commitments liability.

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Enhancing or designing and implementing controls over the completeness of information used in the determination of our allowance for credit losses, particularly as it relates to our assessment of the underlying assumptions about the collectability of aged accounts receivable, together with procedures and documentation to corroborate our assessment of the underlying assumptions about the collectability of aged accounts receivable.

As we continue to evaluate and work to improve our internal control over financial reporting, management may determine to take additional measures to strengthen controls or to modify the remediation measures described above. When fully implemented and operational, we believe the controls we have designed or plan to design will remediate the material weaknesses that we have identified. Following our design and implementation of our remediation efforts, we will need to demonstrate their operating effectiveness. We will not be able to consider the material weakness remediated until the applicable remedial controls operate for a sufficient period of time and our management has concluded, through testing, that our control is operating effectively.

Changes in internal control

We continue working towards implementing processes and procedures to address the material weaknesses noted above. Other than the ongoing remediation activities disclosed above, there were no changes in our internal control over financial reporting identified in management’s evaluation pursuant to Rules 13a-15(e) and 15d-15(e) of the Exchange Act during the period covered by this Quarterly Report on Form 10-Q that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on effectiveness of controls and procedures

None.