Security News

OpenAI Launches GPT-5.4-Cyber with Expanded Access for Security Teams

OpenAI on Tuesday unveiled GPT-5.4-Cyber, a variant of its latest flagship model, GPT‑5.4, that's specifically optimized for defensive cybersecurity use cases, days after rival Anthropic unveiled its own frontier model, Mythos. "The progressive use of AI accelerates defenders – those responsible for keeping systems, data, and users safe – enabling them to find and fix problems

ISC Stormcast For Wednesday, April 15th, 2026 https://isc.sans.edu/podcastdetail/9892, (Wed, Apr 15th)

Scanning for AI Models, (Tue, Apr 14th)

Starting March 10, 2026, my DShield sensor started getting probe for various AI models such as claude, openclaw, huggingface, etc. Reviewing the data already reported by other DShield sensors to ISC, the DShield database shows reporting of these probes started that day and has been active ever since.

Microsoft Bets $10 Billion to Boost Japan's AI, Cybersecurity

The deal aims to accelerate AI adoption, train workers, and develop cybersecurity partnerships — the latest move by a hyperscaler to compete for sovereign AI and data centers.

Patch Tuesday, April 2026 Edition

Microsoft today pushed software updates to fix a staggering 167 security vulnerabilities in its Windows operating systems and related software, including a SharePoint Server zero-day and a publicly disclosed weakness in Windows Defender dubbed "BlueHammer." Separately, Google Chrome fixed its fourth zero-day of 2026, and an emergency update for Adobe Reader nixes an actively exploited flaw that can lead to remote code execution.

Privilege Elevation Dominates Massive Microsoft Patch Update

Elevation-of-privilege bugs accounted for more than half of the 165 vulnerabilities patched, with two zero-days in that mix.

EDR-Killer Ecosystem Expansion Requires Stronger BYOVD Defenses

Stopping EDR killers, which employ bring-your-own-vulnerable-driver (BYOVD) attack techniques, is difficult, but not impossible.

Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)

This month&&#x23&#x3b;x26&#x3b;&#x23&#x3b;39&#x3b;s Microsoft Patch Tuesday looks like a record one, but let&&#x23&#x3b;x26&#x3b;&#x23&#x3b;39&#x3b;s look at it a bit closer to understand what is happening

Wargame Exercise Demonstrates How Social Media Manipulation Works

In an educational game called "Capture the Narrative," students created bots to sway a fictional election, simulating influence in real-world political scenarios.

New PHP Composer Flaws Enable Arbitrary Command Execution — Patches Released

Two high-severity security vulnerabilities have been disclosed in Composer, a package manager for PHP, that, if successfully exploited, could result in arbitrary command execution. The vulnerabilities have been described as command injection flaws affecting the Perforce VCS (version control software) driver. Details of the two flaws are below - CVE-2026-40176 (CVSS

AI-Driven Pushpaganda Scam Exploits Google Discover to Spread Scareware and Ad Fraud

Cybersecurity researchers have unmasked a novel ad fraud scheme that has been found to leverage search engine poisoning (SEO) techniques and artificial intelligence (AI)-generated content to push deceptive news stories into Google's Discover feed and trick users into enabling persistent browser notifications that lead to scareware and financial scams. The campaign, which has been

Google Adds Rust-Based DNS Parser into Pixel 10 Modem to Enhance Security

Google has announced the integration of a Rust-based Domain Name System (DNS) parser into the modem firmware as part of its ongoing efforts to beef up the security of Pixel devices and push memory-safe code at a more foundational level. "The new Rust-based DNS parser significantly reduces our security risk by mitigating an entire class of vulnerabilities in a risky area, while also laying

Mirax Android RAT Turns Devices into SOCKS5 Proxies, Reaching 220,000 via Meta Ads

A nascent Android remote access trojan called Mirax has been observed actively targeting Spanish-speaking countries, with campaigns reaching more than 220,000 accounts on Facebook, Instagram, Messenger, and Threads through advertisements on Meta. "Mirax integrates advanced Remote Access Trojan (RAT) capabilities, allowing threat actors to fully interact with compromised devices in real

Analysis of 216M Security Findings Shows a 4x Increase In Critical Risk (2026 Report)

OX Security recently analyzed 216 million security findings across 250 organizations over a 90-day period. The primary takeaway: while raw alert volume grew by 52% year-over-year, prioritized critical risk grew by nearly 400%. The surge in AI-assisted development is creating a "velocity gap" where the density of high-impact vulnerabilities is scaling faster than

108 Malicious Chrome Extensions Steal Google and Telegram Data, Affecting 20,000 Users

Cybersecurity researchers have discovered a new campaign in which a cluster of 108 Google Chrome extensions has been found to communicate with the same command-and-control (C2) infrastructure with the goal of collecting user data and enabling browser-level abuse by injecting ads and arbitrary JavaScript code into every web page visited. According to Socket, the extensions are published

ShowDoc RCE Flaw CVE-2025-0520 Actively Exploited on Unpatched Servers

A critical security vulnerability impacting ShowDoc, a document management and collaboration service popular in China, has come under active exploitation in the wild. The vulnerability in question is CVE-2025-0520 (aka CNVD-2020-26585), which carries a CVSS score of 9.4 out of 10.0. It relates to a case of unrestricted file upload that stems from improper validation of

CISA Adds 6 Known Exploited Flaws in Fortinet, Microsoft, and Adobe Software

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added half a dozen security flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The list of vulnerabilities is as follows - CVE-2026-21643 (CVSS score: 9.1) - An SQL injection vulnerability in Fortinet FortiClient EMS that could allow an unauthenticated attacker to

ISC Stormcast For Tuesday, April 14th, 2026 https://isc.sans.edu/podcastdetail/9890, (Tue, Apr 14th)

Why Orgs Need to Test Networks to Withstand DDoS Attacks During Peak Loads

Security teams can't test distributed denial-of-service defenses in a vacuum. They need to test during periods of high demand, such as tax filing deadlines.

CSA: CISOs Should Prepare for Post-Mythos Exploit Storm

Security experts warn of an "AI vulnerability storm" triggered by the introduction of Anthropic's Claude Mythos in a new paper from the Cloud Security Alliance (CSA).