CVE-2026-1858 wget2 Improper Certificate Validation

wget2 accepts a server certificate with incorrect Key Usage KU or Extended Key Usage EKU. If the attackers compromise a certificate with the associated private key issued for a different purpose, they may be able to reuse it for TLS server authentication...

The HoneyMyte APT evolves with a kernel-mode rootkit and a ToneShell backdoor

Overview of the attacks In mid-2025, we identified a malicious driver file on computer systems in Asia. The driver file is signed with an old, stolen, or leaked digital certificate and registers as a mini-filter driver on infected machines. Its end-goal is to inject a backdoor Trojan into the...

ForgeCert - "Golden" Certificates

ForgeCert uses the BouncyCastle C API and a stolen Certificate Authority CA certificate + private key to forge certificates for arbitrary users capable of authentication to Active Directory. This attack is codified as DPERSIST1 in our "Certified Pre-Owned" whitepaper. This code base was released ...

Mimecast Finds SolarWinds Hackers Stole Some of Its Source Code

Email security firm Mimecast on Tuesday revealed that the state-sponsored SolarWinds hackers who broke into its internal network also downloaded source code out of a limited number of repositories. "The threat actor did access a subset of email addresses and other contact information and hashed a...

Explained: How New 'Delegated Credentials' Boosts TLS Protocol Security

Mozilla, in partnership with Facebook, Cloudflare, and other IETF community members, has announced technical specifications for a new cryptographic protocol called "Delegated Credentials for TLS." Delegated Credentials for TLS is a new simplified way to implement "short-lived" certificates withou...

Malware threat to Opera users, Trojan signed with a stolen certificate

On June 19, Browser maker Opera admitted that, it discovered an attack on its internal network infrastructure and windows users may have been tricked into installing a Trojan signed with a stolen Opera certificate. "On June 19th we uncovered, halted and contained a targeted attack on our internal...

Malware threat to Opera users, Trojan signed with a stolen certificate

On June 19, Browser maker Opera admitted that, it discovered an attack on its internal network infrastructure and windows users may have been tricked into installing a Trojan signed with a stolen Opera certificate. "On June 19th we uncovered, halted and contained a targeted attack on our internal...