3 posts
Arctic Wolf Labs observed an ongoing campaign exploiting CVE-2026-0257, a high-severity authentication bypass vulnerability in Palo Alto Networks GlobalProtect. Threat actors are forging authentication override cookies to establish unauthorized VPN sessions, followed by rapid internal network reconnaissance using Impacket tooling.
Threat actors exploited CVE-2026-35616, an improper access control vulnerability in FortiClient EMS, to deploy a novel credential stealer named EKZ Infostealer to managed endpoints. The attackers abused legitimate VPN scripting workflows to execute malicious PowerShell commands that downloaded the stealer, which subsequently harvested browser credentials and exfiltrated them to a threat-actor-controlled server.
The article highlights the critical need to transition various network protocols, including SSH, IPsec, OpenPGP, and DNSSEC, to post-quantum cryptography (PQC) to mitigate the 'harvest now, decrypt later' threat. While TLS and SSH have clear upgrade paths with hybrid key exchanges, protocols like DNSSEC face complex architectural challenges due to signature sizes and UDP limitations.
