Summary CVE-2026-48558 is a critical authentication bypass vulnerability in SimpleHelp Remote Monitoring and Management (RMM) software, caused by improper validation of OpenID Connect (OIDC) token
Threat Summary A suite of severe vulnerabilities has been disclosed in libssh2 (an SSH client library widely embedded in software such as curl, Git GUI
Summary In mid-June 2026, security researchers identified an active, large-scale credential compromise campaign affecting Fortinet FortiGate firewalls, dubbed FortiBleed. Threat actors have been systematically extracting
Threat Summary CVE-2026-25089 is a critical OS command injection (CWE-78) vulnerability discovered in Fortinet FortiSandbox versions 4.4.0–4.4.8, 5.0.0–5.0.5, and corresponding Cloud and Platform as a
Threat Summary On June 9, 2026, Microsoft released its regular Patch Tuesday security update, fixing 206 vulnerabilities (with 39 rated Critical) affecting a broad spectrum
Summary A critical unauthenticated remote code execution vulnerability in Oracle PeopleSoft PeopleTools, tracked as CVE-2026-35273, is under active exploitation by the ShinyHunters extortion group in
On June 9–10, 2026, Ivanti disclosed and patched two maximum-severity vulnerabilities in the Sentry appliance (formerly MobileIron Sentry): CVE-2026-10520 (OS command injection, CVSS 10.0) and
Threat Summary CVE-2026-50751 is a critical vulnerability (CVSS 9.3) in Check Point Remote Access VPN, Mobile Access, and Spark Firewall products using the deprecated IKEv1 key
For the latest insight into this threat, see our latest research publication. In early June 2026, Arctic Wolf observed an increase in active exploitation of
On May 6, 2026, Palo Alto Networks disclosed a critical buffer overflow vulnerability (CVE-2026-0300) in the User-ID™ Authentication Portal (Captive Portal) component of PAN-OS. This
Updated May 1 Anthropic has officially launched Claude Security, moving its AI‑driven code vulnerability detection, validation, and patching capabilities from a limited research preview into
On April 14, 2026, Microsoft released its April 2026 security update, addressing 165 newly disclosed vulnerabilities. Among these, Arctic Wolf has highlighted two vulnerabilities in
Summary On April 4, 2026, Fortinet released a hotfix for a critical vulnerability in FortiClient EMS (CVE-2026-35616) that allows unauthenticated remote threat actors to execute
On March 10, 2026, Progress ShareFile released fixes for two critical severity vulnerabilities in Progress ShareFile Storage Zones Controller (SZC) 5.x, tracked as CVE-2026-2699 and
The widely used Axios npm package, a JavaScript library that enables applications to make HTTP/S requests and is included as a dependency in millions of
On March 28, 2026, F5 updated its security advisory for a vulnerability impacting BIG-IP APM that was originally disclosed in October 2025 (CVE-2025-53521). The vulnerability
Arctic Wolf has recently observed a phishing campaign targeting Microsoft 365 that abuses the OAuth device code flow to trick victims into providing authentication codes.
Summary The threat actor TeamPCP has recently launched a coordinated campaign targeting security tools and open-source developer infrastructure by pivoting with stolen CI/CD secrets and
On March 23, 2026, Citrix released fixes for a critical vulnerability affecting NetScaler ADC and NetScaler Gateway (CVE‑2026‑3055) that allows unauthenticated threat actors to perform
On March 20, 2026, Oracle released fixes for a critical vulnerability in its Fusion Middleware suite affecting Identity Manager and Web Services Manager, tracked as
On March 10, 2026, Microsoft released its March 2026 security update addressing 83 newly disclosed vulnerabilities. Arctic Wolf has highlighted three vulnerabilities affecting Microsoft Office
On March 03, 2026, pac4j released fixes for a maximum severity vulnerability in pac4j-jwt, tracked as CVE-2026-29000. The flaw arises from improper verification of cryptographic
On March 4, 2026, Cisco released fixes for two maximum-severity vulnerabilities impacting Cisco Secure Firewall Management Center (FMC), which is used to centrally manage Cisco Secure Firewall
On February 28, 2026, the United States, in coordination with Israel, launched a large-scale military campaign against Iran known as Operation Epic Fury, marking a
On February 24, 2026, sooperset, the mcp-atlassian project maintainer, released fixes for a critical vulnerability in mcp-atlassian, tracked as CVE-2026-27825. The flaw arises from missing directory confinement and inadequate path traversal
On February 25, 2026, Cisco released fixes for a maximum severity authentication bypass vulnerability in Cisco Catalyst SD-WAN Controller (formerly vSmart) and Cisco Catalyst SD-WAN
Since our previous security bulletin, Arctic Wolf has observed malicious activities in the wild tied to suspected exploitation of CVE-2026-1731 of self-hosted BeyondTrust Remote Support
On February 10, 2026, Microsoft released its February 2026 security update, addressing 59 newly disclosed vulnerabilities. Arctic Wolf highlighted six of these vulnerabilities affecting Microsoft Windows and Microsoft Office
On February 6, 2026, Fortinet released fixes for a critical vulnerability in FortiClientEMS, tracked as CVE-2026-21643. The flaw arises from improper neutralization of special elements used in SQL
Update: Arctic Wolf has observed suspected exploitation of CVE-2026-1731 and has published its findings in an updated security bulletin, available here. On February 6, 2026,
