IT News Analysis

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Critical FortiMail Zero-Day Flaw Exploited in Attacks Allows Unauthenticated Arbitrary File Writes

The U.S. Cybersecurity and Infrastructure Security Agency (CISA), on Thursday, added a critical security flaw impacting Fortinet FortiMail to its Known Exploited Vulnerabilities ( KEV ) catalog, following reports of active exploitation. The vulnerability, tracked as CVE-2026-104286 (CVSS score: 9.8), allows unauthenticated attackers to write arbitrary files on the underlying system. "An improper limitation of a pathname to a restricted directory ('path traversal') [CWE-22] and improper neutralization of NULL byte or NULL character [CWE-158] vulnerability may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests," Fortinet said in an advisory. The vulnerability impacts the following versions - FortiMail 8.0.0 through 8.0.1 (Upgrade to upcoming 8.0.2 or above) FortiMail 7.6.0 through 7.6.6 (Upgrade to upcoming 7.6.7 or above) FortiMail 7.4.0 through 7.4.8 (Upgrade to upcoming 7.4.9 or a...

Oct 02, 2026

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Police Arrest 16-Year-Old Suspected of Running KillSec, Seize Ransomware Leak Site and Servers

Police in Spain have arrested a 16-year-old whom investigators suspect of running the KillSec ransomware group. KillSec is accused of stealing data from organizations and threatening to publish it on its leak site unless they paid. The 16-year-old was one of 3 people arrested on September 30, when police also took control of that site. Investigators identified him as KillSec's suspected administrator and main operator,  Hamburg police said  on October 1. Police and prosecutors in Hamburg, Germany, led the operation. The Guardia Civil and the Mossos d'Esquadra, both Spanish police forces, detained him in Alicante and searched a home and an office at a hotel in the province. Their joint statement,  carried by elperiodic.com , calls him one of the group's administrators and its presumed main administrator. The other 2 people arrested are in their 20s, one in the U.K. and one in Romania, a spokesperson for Europol, the European Union's police agency,  told Reute...

Oct 01, 2026

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ThreatsDay: AI-Powered Zero-Day Chain, 543K Live Secrets, Model Inspection RCE and 13 More Stories

This week, the useful words are boring ones: inspect, cache, compile, store, trust. Each sounds harmless. Each can become an attack path when a system does a little more than people expect. A model check can run code. A cache can mix up requests. A public secret can stay useful for years. That is the lesson running through the list. Attackers do not always need a brilliant new trick. They can hide commands in public infrastructure, reuse old flaws, abuse weak defaults, or let automation stitch together a rough path that still works. Faster tools are changing the pace, but basic mistakes are still doing plenty of the work. So the interesting question this week is not “what broke?” It is “what did we assume was safe because it looked ordinary?” The full list has answers. The threats change every week. Subscribe, and we’ll alert you when each new ThreatsDay Bulletin is out.

Oct 01, 2026

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Reco Finds Four in Five Agents Run With Zero IT Oversight

See which agent permissions security teams aren't reviewing, and why it matters now.

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WordPress Backdoor Rebuilds Itself After Cleanup Using Files, Database, and Shared Memory

Cybersecurity researchers have shed light on a WordPress compromise in which threat actors deployed multiple persistence mechanisms to ensure that the final payload kept returning without having to infect the site again. The backdoor has been codenamed SC after the "SC_" markers present in the injected content. Sucuri has described the malware as a "self-healing mesh" that's blockchain-controlled. "The payload lives in at least eight places at once, spread across files, the database, and shared memory, and every one of those places can rebuild all the others," security researcher Gabriel Barbosa said . "Delete the plugin and a drop-in rewrites it. Delete the drop-in and the theme rewrites it. Clean every file on disk, and the next page load restores the whole set from the database or from a shared-memory segment. The result is a circular system with no single point you can remove to stop it." According to Sucuri, the malware does no...

Oct 01, 2026

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How Financial Services Companies Can Modernize Their Software Supply Chain

Every security leader at a bank, insurer, or asset manager has had a version of this conversation: Security wants to eliminate a class of vulnerabilities. Engineering explains what it would take to upgrade the platform where they live. Somebody prices out the regression testing. Somebody else raises the change-freeze calendar. The finding gets an exception, a compensating control, and a date eighteen months out on the roadmap to address it. Nobody in that conversation is being unreasonable. Financial services carry more legacy software than almost any other industry for a few reasons: decades of accumulated infrastructure, regulatory obligations that reward stability, and applications where an hour of downtime is unacceptable. In that environment, minimizing change is risk management. Every dependency bump, every base image swap, every migration is a chance to break something that clears trades or moves money. So the instinct to stick to the status quo has been sound. The problem...

Oct 01, 2026

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Build Your Email Security Strategy for the Agentic Era

Get the 2026 checklist for defending against AI phishing, compromised accounts, and human error.

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OpenAI Disrupts Reasoning Extraction Campaign Linked to Moonshot AI Associates

OpenAI on Wednesday said it identified and disrupted a coordinated distillation campaign that was designed to illicitly extract protected reasoning from its artificial intelligence (AI) models. A "core cluster of the activity," going back to the first week of July, has been attributed to individuals associated with Moonshot AI, a Chinese AI company based in Beijing. It did not cite any technical evidence to back this assessment, likely owing to security reasons. "The operators did not break our encryption, compromise a database, or gain direct access to stored user conversations," OpenAI said . "Instead, they manipulated model interactions so that protected reasoning could be reproduced in forms visible to the requester in a coordinated, scaled manner that violated our terms of service." The activity is said to have begun on July 1, 2026, initially at a low volume before it spiked on July 24 and 25, 2026, to 16,000 attempted requests using a relevan...

Oct 01, 2026

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CISA Adds Exploited Cisco Catalyst SD-WAN Manager Auth Bypass to KEV

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Wednesday added a critical authentication bypass flaw impacting Cisco Catalyst SD-WAN Manager to its Known Exploited Vulnerabilities ( KEV ), following reports of active exploitation. The vulnerability, tracked as CVE-2026-76504 (CVSS score: 9.8), could allow an unauthenticated, remote attacker to access an affected system with the privileges of the admin user. "Cisco Catalyst SD-WAN Manager contains a hex encoding vulnerability that could allow an unauthenticated, remote attacker to access an affected system with privileges of the admin user due to improper handling of URI encoding in an HTTP request," CISA said. Successful exploitation could allow an attacker to sidestep authentication by sending a crafted HTTP request to the API of the affected system, and gain access to the API as the admin user.

Oct 01, 2026

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Google Rolls Out Gemini 4 Argon to Trusted Cyber Defenders, Plans Guardrail-Free Version

Google on Wednesday announced its latest frontier artificial intelligence (AI) model, Gemini 4 Argon , that it said is being rolled out to a set of trusted cyber defenders through its Fairwind Program. "It delivers frontier performance in complex workflows across real-world software engineering, enterprise knowledge work like legal and finance, and cybersecurity defense," Koray Kavukcuoglu, senior vice president of Google DeepMind and Chief AI Architect at Google, said . The development comes nearly a month after the tech giant unveiled Gemini 3.8 Flash Cyber , which it described as the most capable cybersecurity model. Like similar models from rivals Anthropic and OpenAI, Argon is assessed to be highly capable at autonomously finding, validating, and patching critical software vulnerabilities. This includes a previously unknown critical vulnerability exposing sensitive personal information across healthcare software used by hospitals worldwide. Google did not reveal...

Oct 01, 2026