A technical exploration of a trivial Local Privilege Escalation Vulnerability in CCleaner <= v1.18.30 on macOS.

Following the introduction of crypto-condor and differential fuzzing in earlier blogposts, we showcase a use case where Quarsklab's automated test suite for cryptographic implementations allowed us to improve the reference implementation of the recently standardized HQC scheme.

A technical exploration of modern phishing tactics, from basic HTML pages to advanced MFA-bypassing techniques, with analysis of infrastructure setup and delivery methods used by phishers in 2025.

Allbridge mandated Quarkslab to perform an audit of their updated version of Estrela, an automated market maker for Stellar built on Soroban.

The following article describes how, during an "assumed breach" security audit, we compromised multiple web applications on our client's network in order to carry out a watering hole attack by installing fake Single Sign-On pages on the compromised servers. This article is the first of a two-part series and explains why it is not enough to just check for CVEs, and why we should dive deep into the code to look for new vulnerabilities in old code bases. We will take phpMyAdmin version 2.11.5 as an example, as this is the version we encountered during the audit.

In this series of articles we describe how, during an "assumed breach" security audit, we compromised multiple web applications on our client's network to carry out a watering hole attack by installing fake Single Sign-On pages on compromised servers. In our second episode we take a look at SOPlanning, a project management application that we encountered during the audit.

Apple released iOS 18.3.1 (build 22D72) to patch a vulnerability tied to the Accessibility framework and reported by Citizen Lab. Let's analyze it!

In this blog post we explain the consequences of asking our R&D boss for a Steam Deck as a Christmas gift. It involves a couple of vulnerabilities, limited primitives, challenging exploitation and a long disclosure process.

The OSTIF engaged with Quarkslab to perform a security audit of the Notary project, focused on new features.

This blog post presents our fuzzer for the Bluetooth Low Energy GATT layer and the related vulnerabilities found with it.