Cybersecurity Brief – 2026-02-27

Fri, 27 Feb 2026 00:00:00 +0000

Major Incidents or Breaches

ManoMano, a major European DIY retail chain, has suffered a data breach impacting 38 million customers. The breach was caused by the compromise of a third-party service provider.
French football club Olympique de Marseille confirmed an attempted cyberattack following a data leak, with a threat actor claiming responsibility for breaching the club’s systems.
Conduent, a US-based business process services company, has revised the impact of its third-party breach to 25 million affected Americans.
A new malicious NuGet package, “StripeApi,” was discovered impersonating a legitimate Stripe library to steal API tokens, targeting the financial sector.
Google API keys previously considered harmless can now be abused to access private Gemini AI data if exposed in client-side code.
Anthropic patched vulnerabilities in its Claude AI code interpreter that could have allowed silent compromise of developer devices through malicious configuration files.

Trend Micro patched two critical remote code execution vulnerabilities in Apex One endpoint security products for Windows, and addressed a total of eight critical and high-severity issues across Windows and macOS versions.
A critical vulnerability in Juniper Networks’ PTX Series routers running Junos OS Evolved allows unauthenticated remote code execution with root privileges, enabling full router takeover.
Cisco disclosed and patched a maximum-severity zero-day vulnerability (CVE-2026-20127) in its SD-WAN software, which had been exploited for three years by a sophisticated threat actor, allowing authentication bypass and administrative access.
Zyxel patched a critical remote code execution vulnerability in the UPnP function affecting multiple device models.
Four vulnerabilities were disclosed in Gardyn smart garden products, allowing remote hacking; CISA has issued an advisory on these flaws.

Google’s Threat Intelligence Group reported that nation-state actors are using Gemini and other AI tools to enhance phishing, malware development, and social engineering campaigns.
A previously undocumented threat cluster, UAT-10027, has been targeting US education and healthcare sectors since December 2025, deploying the Dohdoor backdoor.
The Aeternum C2 botnet loader was revealed to use encrypted command storage on the Polygon blockchain, making its command-and-control infrastructure highly resistant to takedown.
Microsoft observed a coordinated campaign targeting developers via malicious Next.js repositories purporting to be legitimate, delivering in-memory malware and establishing persistence.
Fake Zoom and Google Meet scams are distributing the legitimate Teramind monitoring tool as malware by exploiting trusted branding.
CISA released an updated analysis of the RESURGE malware, highlighting continued stealthy and active operations.
The US Treasury sanctioned Russian exploit broker Operation Zero, which acquired eight zero-day exploits from a US defense contractor.

Ransomware payment rates have dropped to a record low of 28% despite an increase in the number of attacks, indicating a shift in victim response and negotiation strategies.
Threat actors are increasingly leveraging AI-based tools, such as Gemini and Claude, to automate and refine attack techniques.
Blockchain technology is being adopted for resilient command-and-control infrastructure, as demonstrated by the Aeternum C2 botnet.
There is a rise in attacks targeting developers, including via malicious open-source packages and fake technical assessment repositories.
Open source project IronCurtain has been released, aiming to constrain and secure AI assistant agents to prevent unintended actions.

Apple iPhone and iPad devices have been cleared for handling classified information by NATO, having been added to the NATO Information Assurance Product Catalogue (NIAPC).
The US government has imposed sanctions on Russian exploit broker Operation Zero for trafficking zero-day exploits.
A lawsuit (Marquis v. SonicWall) is raising questions about liability in third-party breaches, with a FinTech company holding a firewall provider responsible for breach damages.
New York Attorney General filed a lawsuit against Valve Corporation, alleging illegal gambling promotion through game loot boxes targeting minors.
Industry experts are recommending immediate preparation for post-quantum cryptography (PQC) to counter future risks of encrypted data theft and decryption.