The Telstra outage that left emergency calls and rail networks exposed has pushed cybersecurity and network resilience back into the spotlight. For investors, the key question is which stocks might gain renewed attention as governments and companies reassess how they protect critical infrastructure, and which might face tougher questions on reliability. This article focuses on the cybersecurity and network reliability theme and looks at how recent events could shape sentiment. Below, you will find 3 stocks that appear positively exposed to the news and could sit on the right side of rising scrutiny on digital infrastructure resilience.

Commvault Systems (CVLT)

Overview: Commvault Systems provides cyber resiliency and data protection software that helps enterprises back up, secure, and recover critical data, applications, and identity systems across on premise, cloud, and hybrid environments, including tools tailored to ransomware response and clean recovery.

Operations: Commvault Systems generates about US$1.18b in revenue primarily from Software & Programming, with around US$631.0m from the United States and US$552.7m from other regions.

Market Cap: US$6.4b

Commvault Systems sits squarely in the spotlight after the Telstra outage because its core strength is helping large enterprises and telecoms recover quickly when critical systems fail. The business now spans a broad set of cyber resilience tools, from cleanroom recovery and air gapped backups to new AI driven offerings and deep partnerships with Microsoft Azure and Google Cloud. These could appeal to operators under pressure to prove their resilience. At the same time, a very high P/E, reliance on large deals, a recent one off loss, insider selling, and a debt heavy balance sheet give you reasons to be selective. How those strengths and pressure points balance out is where the real opportunity, or risk, lies for Commvault Systems investors.

Commvault Systems sits at the crossroads of surging resilience demand and a stretched P/E that many investors might be underestimating, so walk through the 2 key rewards and 2 important warning signs to see what could be hiding behind those headline numbers

ADTRAN Holdings (ADTN)

Overview: ADTRAN Holdings supplies the hardware and software that sit at the heart of broadband and telecom networks, from fiber access gear and routers to optical transport systems and network management tools used by carriers and enterprises across the US, Europe, and other regions.

Operations: ADTRAN Holdings generates about US$932.6m from Network Solutions and US$189.5m from Services & Support, with revenue spread across the United States, Germany, the United Kingdom, and other international markets.

Market Cap: US$1.01b

ADTRAN Holdings is drawing fresh interest as outages like Telstra’s put resilient networking and real time monitoring in focus. The company already supplies many of the fiber, optical transport, and quantum safe security tools that operators use to keep traffic flowing. Recent quantum secure projects in Europe, ongoing broadband and data center buildouts, and a relatively low P/S multiple give some investors a reason to look closely, even though ADTRAN is still loss making and the share price has been volatile. Currency swings, reliance on carrier spending, and insider selling indicate that this is not a low risk story, but for investors who think resilience and secure connectivity will stay front and center, the full ADTRAN Holdings picture may be worth a deeper look.

ADTRAN’s mix of quantum secure projects, carrier exposure, and a relatively low P/S multiple feels like an overlooked setup; walk through the 3 key rewards and 2 important warning signs to see what the share price might be missing

N-able (NABL)

Overview: N-able provides cloud based software that helps managed service providers and IT teams monitor, secure, and manage thousands of devices and applications from a single platform, including tools for backup, disaster recovery, and cyber threat detection.

Operations: N-able generates about US$526.9m in revenue from Internet Software & Services, with roughly US$258.1m from the United States, US$54.2m from the United Kingdom, and US$214.5m from other international markets.

Market Cap: US$825.1m

N-able stands out after the Telstra outage because its cloud native monitoring, backup, and incident response tools are built to spot problems early and keep small and mid sized customers online when networks fail. The company is focusing on AI security, new partnerships, and a growing footprint in India to support product development. At the same time, N-able still reports losses, carries funding risk through external borrowing, and has seen its stock fall out of key indices, which could matter if execution on new AI and channel initiatives stalls. For investors, the question is how to weigh demand for resilience and the current valuation against the execution and funding risks.

N-able’s AI security focus and global footprint may be obscuring a broader story about its growth and resilience, so explore the analyst forecasts for N-able to understand what the market might be overlooking

The three stocks in this article are just a starting point, and the full Cybersecurity and Network Reliability Stocks screener surfaces 27 more companies tied to cybersecurity, network monitoring, redundancy, and infrastructure security that could have equally compelling narratives. Use Simply Wall St to identify, filter, and analyze the specific catalysts and storylines that matter most to you so you can focus on the highest conviction opportunities in this theme.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.