Exhibit 99.1

CISCO REPORTS FOURTH QUARTER AND FISCAL YEAR 2018 EARNINGS

SAN JOSE, Calif. — August 15, 2018 — Cisco today reported fourth quarter and fiscal year results for the period ended July 28, 2018. Cisco reported fourth quarter revenue of $12.8 billion, net income on a generally accepted accounting principles (GAAP) basis of $3.8 billion or $0.81 per share, and non-GAAP net income of $3.3 billion or $0.70 per share.

“We had a very strong finish to a great year and generated our highest quarterly revenue of $12.8 billion,” said Chuck Robbins, Chairman and CEO of Cisco. “Our results demonstrate a combination of strong customer adoption of our latest innovations, the ongoing value customers see in our software and subscription offerings, and excellent execution across our customer segments and geographies. Our strategy is working and we believe that are well-positioned to capture growth across our portfolio with our pipeline of innovation.”

Q4 GAAP Results

Q4 GAAP results include an $863 million benefit related to the Tax Cuts and Jobs Act. Non-GAAP results exclude this benefit.

Q4 Non-GAAP Results

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Fiscal Year GAAP Results

Fiscal year GAAP results include a $10.4 billion charge related to the enactment of the Tax Cuts and Jobs Act comprised of $8.1 billion for the U.S. transition tax, $1.2 billion for foreign withholding tax and $1.1 billion for the re-measurement of net deferred tax assets.

Fiscal Year Non-GAAP Results

Reconciliations between net income, EPS, and other measures on a GAAP and non-GAAP basis are provided in the tables located in the section entitled “Reconciliations of GAAP to non-GAAP Measures.”

“Q4 was another quarter of broad-based strength across our portfolio reflecting our strong execution and momentum. We delivered record quarterly revenue, up 6%, and non-GAAP EPS, up 15%,” said Kelly Kramer, CFO of Cisco. “We are seeing solid demand for our products and solutions while continuing to make progress in transforming our business model and driving long-term shareholder value.”

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Financial Summary

All comparative percentages are on a year-over-year basis unless otherwise noted.

Q4 FY 2018 Highlights

Revenue — Total revenue was $12.8 billion, up 6%, with product revenue up 7% and service revenue up 3%. Recurring revenue as a percentage of total revenue was 32%, up 1 point year over year. Revenue by geographic segment was: Americas up 5%, EMEA up 8%, and APJC up 6%. Product revenue performance was generally broad based with growth in Security, up 12%, Applications, up 10%, and Infrastructure Platforms, up 7%.

Gross Margin — On a GAAP basis, total gross margin, product gross margin, and service gross margin were 61.7%, 60.2%, and 66.0%, respectively, as compared with 62.2%, 60.3%, and 67.8%, respectively, in the fourth quarter of 2017.

On a non-GAAP basis, total gross margin, product gross margin, and service gross margin were 62.9%, 61.5%, and 67.1%, respectively, as compared with 63.7%, 61.9%, and 68.8%, respectively, in the fourth quarter of 2017.

Total gross margins by geographic segment were: 64.1% for the Americas, 63.7% for EMEA and 57.7% for APJC.

Operating Expenses — On a GAAP basis, operating expenses were $4.6 billion, up 1%. Non-GAAP operating expenses were $4.1 billion, up 5%, and were 32.0% of revenue.

Operating Income — GAAP operating income was $3.3 billion, up 10%, with GAAP operating margin of 26.1%. Non-GAAP operating income was $4.0 billion, up 4%, with non-GAAP operating margin at 30.9%.

Provision for (benefit from) Income Taxes — The GAAP tax provision rate was (5.9)%, which includes an $863 million benefit related to the Tax Cuts and Jobs Act. The non-GAAP tax provision rate was 21.2%.

Net Income and EPS — On a GAAP basis, net income was $3.8 billion and EPS was $0.81. On a non-GAAP basis, net income was $3.3 billion, an increase of 8%, and EPS was $0.70, an increase of 15%.

Cash Flow from Operating Activities — $4.1 billion for the fourth quarter of fiscal 2018, an increase of 2% compared with $4.0 billion for the fourth quarter of fiscal 2017.

FY 2018 Highlights

Revenue — Total revenue was $49.3 billion, an increase of 3%.

Net Income and EPS — On a GAAP basis, net income was $0.1 billion and EPS was $0.02. GAAP net income includes a $10.4 billion charge related to the enactment of the Tax Cuts and Jobs Act comprised of $8.1 billion for the U.S. transition tax, $1.2 billion for foreign withholding tax and $1.1 billion for the re-measurement of net deferred tax assets.

On a non-GAAP basis, net income was $12.7 billion, up 5% compared to fiscal 2017, and EPS was $2.60, an increase of 9%.

Cash Flow from Operating Activities — $13.7 billion for fiscal 2018, compared with $13.9 billion for fiscal 2017, a decrease of 2%. Operating cash flow for fiscal 2018 includes the payments of $1.4 billion of one-time foreign taxes as related to the Tax Cuts and Jobs Act. Operating cash flow increased 8%, normalized for these tax payments.

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Balance Sheet and Other Financial Highlights

Cash and Cash Equivalents and Investments — $46.5 billion at the end of the fourth quarter of fiscal 2018, compared with $54.4 billion at the end of the third quarter of fiscal 2018, and compared with $70.5 billion at the end of fiscal 2017. The total cash and cash equivalents and investments available in the United States at the end of the fourth quarter of fiscal 2018 were $40.4 billion.

Deferred Revenue — $19.7 billion, up 6% in total, with deferred product revenue up 15%, driven largely by subscription-based and software offers, and deferred service revenue was up 1%. The portion of deferred product revenue related to recurring software and subscription offers increased 23%.

Product Backlog — $6.6 billion at the end of fiscal 2018, an increase of 38% compared with the balance at the end of fiscal 2017.

Capital Allocation — For the fourth quarter of fiscal 2018, Cisco returned $7.5 billion to shareholders through share buybacks and dividends. Cisco declared and paid a cash dividend of $0.33 per common share, or $1.5 billion. Cisco repurchased approximately 138 million shares of common stock under its stock repurchase program at an average price of $43.58 per share for an aggregate purchase price of $6.0 billion.

For the full fiscal year, Cisco returned $23.6 billion to shareholders through share buybacks and dividends. Cisco declared and paid cash dividends of $1.24 per common share, or $6.0 billion. Cisco repurchased approximately 432 million shares of common stock under its stock repurchase program at an average price of $40.88 per share for an aggregate purchase price of $17.7 billion. The remaining authorized amount for stock repurchases under the program is approximately $19.0 billion with no termination date.

Acquisitions and Divestitures

In the fourth quarter of fiscal 2018, we closed the acquisition of Accompany, a privately held company that provides an AI-driven relationship intelligence platform. We also announced our intent to acquire July Systems, Inc., a privately held company that provides enterprise-grade location platform through cloud-based subscription offerings. This acquisition closed in the first quarter of fiscal 2019. In the fourth quarter of fiscal 2018, we announced an agreement to sell our Service Provider Video Software Solutions (SPVSS) business. We expect this transaction to close in the first half of fiscal 2019 subject to customary closing conditions and regulatory approvals.

On August 2, 2018, we announced our intent to acquire Duo Security, a privately held company that provides unified access security and multi-factor authentication delivered through the cloud. The acquisition is expected to close in the first quarter of fiscal 2019, subject to customary closing conditions and regulatory approvals.

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Guidance for Q1 FY 2019

Cisco expects to achieve the following results for the first quarter of fiscal 2019:

The guidance includes our SPVSS business that we recently agreed to sell and excludes the Duo Security acquisition since both transactions have not closed. We expect the SPVSS transaction to close in the first half of fiscal 2019 subject to customary closing conditions and regulatory approvals.

At the beginning of fiscal 2019, Cisco adopted the Financial Accounting Standards Board new standard on revenue recognition (ASC 606) using the modified retrospective method. The revenue guidance in the preceding table includes the impact of ASC 606 which we estimate to be a benefit of about 1% year over year.

Cisco estimates that GAAP EPS will be $0.69 to $0.74 in the first quarter of fiscal 2019.

A reconciliation between the Guidance for Q1 FY 2019 on a GAAP and non-GAAP basis is provided in the table entitled “GAAP to non-GAAP Guidance for Q1 FY 2019” located in the section entitled “Reconciliations of GAAP to non-GAAP Measures.”

Editor’s Notes:

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CISCO SYSTEMS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(In millions, except per-share amounts)

(Unaudited)

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CISCO SYSTEMS, INC.

REVENUE BY SEGMENT

(In millions, except percentages)

Amounts may not sum and percentages may not recalculate due to rounding.

CISCO SYSTEMS, INC.

GROSS MARGIN PERCENTAGE BY SEGMENT

(In percentages)

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CISCO SYSTEMS, INC.

REVENUE FOR GROUPS OF SIMILAR PRODUCTS AND SERVICES

(In millions, except percentages)

Amounts may not sum and percentages may not recalculate due to rounding.

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CISCO SYSTEMS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In millions)

(Unaudited)

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CISCO SYSTEMS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions)

(Unaudited)

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CISCO SYSTEMS, INC.

DEFERRED REVENUE

(In millions)

CISCO SYSTEMS, INC.

DIVIDENDS PAID AND REPURCHASES OF COMMON STOCK

(In millions, except per-share amounts)

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CISCO SYSTEMS, INC.

RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

GAAP TO NON-GAAP NET INCOME

(In millions, except per-share amounts)

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CISCO SYSTEMS, INC.

RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

GROSS MARGINS, OPERATING EXPENSES, OPERATING MARGINS, AND NET INCOME

(In millions, except percentages)

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CISCO SYSTEMS, INC.

RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

GROSS MARGINS, OPERATING EXPENSES, OPERATING MARGINS, AND NET INCOME

(In millions, except percentages)

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CISCO SYSTEMS, INC.

RECONCILIATIONS OF GAAP TO NON-GAAP MEASURES

EFFECTIVE TAX RATE

(In percentages)

GAAP TO NON-GAAP GUIDANCE FOR Q1 FY 2019

The guidance includes our SPVSS business that we recently agreed to sell and excludes the Duo Security acquisition since both transactions have not closed. We expect the SPVSS transaction to close in the first half of fiscal 2019 subject to customary closing conditions and regulatory approvals.

At the beginning of fiscal 2019, we adopted the Financial Accounting Standards Board new standard on revenue recognition (ASC 606) using the modified retrospective method. The revenue guidance in the preceding table includes the impact of ASC 606 which we estimate to be a benefit of about 1% year over year.

Except as noted above, this guidance does not include the effects of any future acquisitions/divestitures, asset impairments, restructurings and significant tax matters or other events, which may or may not be significant unless specifically stated.

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Forward Looking Statements, Non-GAAP Information and Additional Information

This release may be deemed to contain forward-looking statements, which are subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, among other things, statements regarding future events (such as execution on our strategy, the ability to grow across our portfolio with our pipeline of innovation, continued customer adoption of our innovations and continued solid demand for our products and solutions, continued progress in transforming our business model and the ongoing value customers see in our software and subscription offerings, execution across our customer segments and geographies, continued broad-based strength across our portfolio, continued strong execution and momentum, and our ability to deliver profitable growth and drive long-term shareholder value) and the future financial performance of Cisco (including the guidance for Q1 FY 2019) that involve risks and uncertainties. Readers are cautioned that these forward-looking statements are only predictions and may differ materially from actual future events or results due to a variety of factors, including: business and economic conditions and growth trends in the networking industry, our customer markets and various geographic regions; global economic conditions and uncertainties in the geopolitical environment; overall information technology spending; the growth and evolution of the Internet and levels of capital spending on Internet-based systems; variations in customer demand for products and services, including sales to the service provider market and other customer markets; the return on our investments in certain priorities, key growth areas, and in certain geographical locations, as well as maintaining leadership in routing, switching and services; the timing of orders and manufacturing and customer lead times; changes in customer order patterns or customer mix; insufficient, excess or obsolete inventory; variability of component costs; variations in sales channels, product costs or mix of products sold; our ability to successfully acquire businesses and technologies and to successfully integrate and operate these acquired businesses and technologies; our ability to achieve expected benefits of our partnerships; increased competition in our product and service markets, including the data center market; dependence on the introduction and market acceptance of new product offerings and standards; rapid technological and market change; manufacturing and sourcing risks; product defects and returns; litigation involving patents, intellectual property, antitrust, shareholder and other matters, and governmental investigations; our ability to achieve the benefits of the announced restructuring and possible changes in the size and timing of the related charges; man-made problems such as cyber-attacks, data protection breaches, computer viruses or terrorism; natural catastrophic events; a pandemic or epidemic; our ability to achieve the benefits anticipated from our investments in sales, engineering, service, marketing and manufacturing activities; our ability to recruit and retain key personnel; our ability to manage financial risk, and to manage expenses during economic downturns; risks related to the global nature of our operations, including our operations in emerging markets; currency fluctuations and other international factors; changes in provision for income taxes, including changes in tax laws and regulations or adverse outcomes resulting from examinations of our income tax returns; potential volatility in operating results; and other factors listed in Cisco’s most recent reports on Forms 10-Q and 10-K filed on May 22, 2018 and September 7, 2017, respectively. The financial information contained in this release should be read in conjunction with the consolidated financial statements and notes thereto included in Cisco’s most recent reports on Forms 10-Q and 10-K as each may be amended from time to time. Cisco’s results of operations for the three months and the year ended July 28, 2018 are not necessarily indicative of Cisco’s operating results for any future periods. Any projections in this release are based on limited information currently available to Cisco, which is subject to change. Although any such projections and the factors influencing them will likely change, Cisco will not necessarily update the information, since Cisco will only provide guidance at certain points during the year. Such information speaks only as of the date of this release.

This release includes non-GAAP net income, non-GAAP gross margins, non-GAAP operating expenses, non-GAAP operating income and margin, non-GAAP effective tax rates, and non-GAAP net income per share data for the periods presented. It also includes future estimated ranges for gross margin, operating margin, tax provision rate and EPS on a non-GAAP basis.