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Notes from
the field

php2shell: A Real Vulnerability, But a Distorted Framing
Security·4 November 2026

php2shell: A Real Vulnerability, But a Distorted Framing

php2shell was a real and serious PHP vulnerability. Our take on what happened in the week of October 20th, what was said about it, and why humans are still the key.

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Introducing Arcas Labs
Research·22 October 2026

Introducing Arcas Labs

We are launching Arcas Labs to turn applied research into a lasting technical advantage for our clients.

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Arcas opens in Luxembourg
Company·8 September 2026

Arcas opens in Luxembourg

We are proud to announce the opening of our Arcas entity and team in Luxembourg.

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