Coverage of named threat actors and intrusion sets examines reported incidents, infrastructure, disruption, and defensive guidance.
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Background for this topic.
Coverage under this tag concerns a named threat actor or intrusion set: an individual, group, or organized operation assessed to be responsible for malicious cyber activity. Reports may describe incidents, malware, attack infrastructure, disruption efforts, or analyst assessments. Attribution is often provisional, so actor names and reported links should be treated as intelligence judgments rather than established identity, nationality, sponsorship, or motive.
For defenders, such reporting can help connect incidents and prioritize monitoring, but indicators and techniques may be reused or become obsolete. Validate reported infrastructure, hashes, and behaviors against local telemetry; use confirmed weaknesses to guide vulnerability remediation and access controls. If activity is suspected, preserve relevant logs and evidence, contain affected accounts or systems, and coordinate investigation without relying on an actor label alone.
Weekly headline count for the current query.
SonicWall warns that threat actors have been exploiting two SMA1000 vulnerabilities, tracked as CVE-2026-15409 and CVE-2026-15410, in zero-day attacks and urges customers to install the newly released security updates. [...]
Threat actors associated with the Anubis ransomware operation have been observed exploiting the Citrix Bleed 2 (CVE-2025-5777) vulnerability to obtain initial access
An unknown threat actor has been observed exploiting a recently disclosed maximum-severity security flaw in SimpleHelp to deliver two previously unreported malware families, TaskWeaver and Djinn Stealer
An unknown threat actor exploited a recently disclosed high-severity security flaw impacting Cisco Catalyst SD-WAN as a zero-day at least two months before it was publicly disclosed, according to new findings from Google-owned Mandiant
We tracked a cryptocurrency-mining campaign exploiting CVE-2026-33017, which revealed how threat actors are now scanning exposed AI application infrastructure for their next foothold.
Attackers are exploiting the critical CVE-2026-10520 flaw in Ivanti Sentry, compromising many internet-exposed gateways shortly after patches were released. Threat actors have started exploiting a maximum-severity OS command injection flaw in Ivanti Sentry, tracked as CVE-2026-10520, that allows remote code execution with root privileges. “An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a remote […]
Attackers are exploiting the critical CVE-2026-10520 flaw in Ivanti Sentry, compromising many internet-exposed gateways shortly after patches were released. Threat actors have started exploiting a maximum-severity OS command injection flaw in Ivanti Sentry, tracked as CVE-2026-10520, that allows remote code execution with root privileges. “An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a remote […]
An unknown threat actor has been observed using a large language model (LLM) agent to conduct post-compromise actions after obtaining initial access following the exploitation of a publicly-accessible Marimo network using a recently disclosed vulnerability
Threat actors are exploiting a critical FortiClient EMS flaw, tracked as CVE-2026-35616, to deploy malware on unpatched systems. Threat actors are exploiting a critical FortiClient EMS vulnerability, tracked as CVE-2026-35616 (CVSS score of 9.1), that allows remote code execution without authentication. Fortinet released fixes in April after confirming zero-day attacks in the wild and urged […]
A threat actor named Mr_Rot13 has been attributed to the exploitation of a recently disclosed critical cPanel flaw to deploy a backdoor codenamed Filemanager on compromised environments
In yet another instance of threat actors quickly jumping on the exploitation bandwagon, a newly disclosed critical security flaw in BerriAI's LiteLLM Python package has come under active exploitation in the wild within 36 hours of the bug becoming public knowledge
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added a critical security flaw impacting F5 BIG-IP Access Policy Manager (APM) to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation
Threat actors are suspected to be exploiting a maximum-severity security flaw impacting Quest KACE Systems Management Appliance (SMA), according to Arctic Wolf
A critical security flaw impacting Langflow has come under active exploitation within 20 hours of public disclosure, highlighting the speed at which threat actors weaponize newly published vulnerabilities
A recently disclosed security flaw patched by Microsoft may have been exploited by the Russia-linked state-sponsored threat actor known as APT28, according to new findings from Akamai
The maximum-severity vulnerability CVE-2026-20127 was exploited by an unknown but sophisticated threat actor who left very little evidence behind.
Threat actors have been observed exploiting a recently disclosed critical security flaw impacting BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) products to conduct a wide range of malicious actions, including deploying VShell and The vulnerability, tracked as CVE-2026-1731 (CVSS score: 9.9), allows attackers to execute operating system commands in the context of the
Threat intelligence observations show that a single threat actor is responsible for most of the active exploitation of two critical vulnerabilities in Ivanti Endpoint Manager Mobile (EPMM), tracked as CVE-2026-21962 and CVE-2026-24061. [...]
A new threat actor called Amaranth Dragon, linked to APT41 state-sponsored Chinese operations, exploited the CVE-2025-8088 vulnerability in WinRAR in espionage attacks on government and law enforcement agencies. [...]
The Russia-linked state-sponsored threat actor known as APT28 (aka UAC-0001) has been attributed to attacks exploiting a newly disclosed security flaw in Microsoft Office as part of a campaign codenamed Operation Neusploit