Zerodays

Security Blogs

Claude Mythos Has Found 271 Zero-Days in Firefox

AndyC 29 April 2026

Claude Mythos Has Found 271 Zero-Days in Firefox That’s a lot. No, it’s an extraordinary number: Since February, the Firefox...

Survey Sees Little Post-Quantum Computing Encryption Progress

Microsoft Patch Tuesday security updates for February 2026 fix six actively exploited zero-days

AndyC 11 February 2026

Microsoft Patch Tuesday security updates for February 2026 fix six actively exploited zero-days Pierluigi Paganini February 10, 2026 Microsoft Patch...

The calm before the ransom: What you see is not all there is

AndyC 1 May 2026

Ransomware A breach claims the systems as well as the confidence that was, in retrospect, a major vulnerability Tomáš Foltýn 24 Apr 2026 • ,...

The calm before the ransom: What you see is not all there is

AndyC 1 May 2026

Ransomware A breach claims the systems as well as the confidence that was, in retrospect, a major vulnerability Tomáš Foltýn 24 Apr 2026 • ,...

GopherWhisper: A burrow full of malware

AndyC 1 May 2026

ESET Research ESET Research has discovered a new China-aligned APT group that we’ve named GopherWhisper, which targets Mongolian governmental institutions Eric Howard 23 Apr 2026...

GopherWhisper: A burrow full of malware

AndyC 1 May 2026

ESET Research ESET Research has discovered a new China-aligned APT group that we’ve named GopherWhisper, which targets Mongolian governmental institutions Eric Howard 23 Apr 2026...

New NGate variant hides in a trojanized NFC payment app

AndyC 1 May 2026

ESET Research has discovered a new variant of the NGate malware family that abuses a legitimate Android application called HandyPay, instead of the previously leveraged...

New NGate variant hides in a trojanized NFC payment app

AndyC 1 May 2026

ESET Research has discovered a new variant of the NGate malware family that abuses a legitimate Android application called HandyPay, instead of the previously leveraged...