Fujitsu (TSE:6702) Faces An AI Security Test On BadEngram As Valuation Questions Linger

Pillar Security and Fujitsu (TSE:6702) have spotlighted BadEngram, a new attack on AI models' memory components. The development is pushing investors to reassess cybersecurity risks around open-weight AI systems and related digital infrastructure exposure.

Recent trading has picked up, with Fujitsu’s 30-day share price return of 8.62% and 90-day gain of 29.93% contrasting with a slight year-to-date decline of 0.56%. The 1-year total shareholder return of 15.37% points to stronger longer term momentum.

The fresh disclosure of BadEngram and the completion of a ¥32.8b buyback tranche in late September give investors new data points to weigh, as the market reassesses how AI security risks and capital returns shape sentiment around the ¥4,285 share price.

Scan for peers facing similar AI security questions around open-weight models by reviewing the hand-picked 94 AI infrastructure stocks, which is shaping how this trend reaches core enterprise systems.

Fujitsu trades about 7% below one fair value estimate and a wider 13% under analyst targets, even after the recent AI security driven jump. Is that caution sensible or overly harsh, given the buyback and risk profile?

Most Popular Narrative: 11% Undervalued

Against a last close of ¥4,285, the most followed narrative anchors fair value for Fujitsu at ¥4,834. This frames the recent AI security news and buyback within a longer running services and advanced computing story.

Rollout of the FUJITSU MONAKA CPU and MONAKA servers from November 2026, together with the wider sovereign platform and quantum computing roadmap that targets around ¥150b of sovereign platform revenue within a much larger addressable market by 2035, is described as providing Fujitsu with new high value revenue streams in advanced computing that can support earnings growth over the long term.

See why 9 investors see Fujitsu as 11% undervalued.

Result: Fair Value of ¥4,834 (UNDERVALUED)

Still, the Fujitsu narrative can break if Hardware and Ubiquitous losses deepen, or if large public sector and defense contracts renew more slowly than analysts expect.

Find out about the key risks to this Fujitsu narrative.

Next Steps

Does the current mix of AI security concern and buyback activity around Fujitsu feel justified to you, or a step behind the data? To pressure test your view against the positives others are watching, start with the 3 key rewards.

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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.

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