セキュリティニュース
3 ページ目
10月21日(水)
「PHP」に複数の深刻な脆弱性 - 21日に修正版を公開予定
「PHP」に複数の深刻な脆弱性が確認された。PHPのセキュリティチームは、10月21日に修正版をリリースする計画で、利用者にアップデートの準備を呼びかけている。
「Plex Media Server」など6件、悪用済み脆弱性に注意喚起 - 米CISA
米サイバーセキュリティインフラセキュリティ庁（CISA）は現地時間2026年10月20日、悪用が確認された脆弱性6件について注意を呼びかけた。
PHPに「緊急」レベルの脆弱性2件 修正版を日本時間21日深夜に公開へ、事前準備を呼び掛け
PHPの開発プロジェクトは最大深刻度「Critical」の2件の重大な脆弱性を修正するアップデートの公開を予告した。リモートコード実行の恐れがあり、旧バージョンを含む広範な環境が影響を受ける可能性がある。専門組織は事前準備や、即時適用が困難な場合は外部からの切り離しを推奨している。
「Chrome 156」公開、脆弱性353件を修正 - 「クリティカル」6件
Googleは、ウェブブラウザ「Chrome」の最新版となる「Chrome 156」をリリースした。多数の脆弱性に対処しており、重要度がもっとも高い「クリティカル（Critical）」とされる脆弱性も6件含まれる。
認証局eMudhraの中間証明書、秘密鍵が「数ミリ秒」で復元可能な脆弱性 大手各社が緊急遮断
インドの認証局eMudhraの中間証明書8件で、秘密鍵が第三者でも瞬時に復元可能な状態だったと判明した。悪用されればWebサイトのなりすましが可能になる。主要Webブラウザは遮断し悪用は確認されていないが、失効検証機能が標準で働かない非ブラウザ環境向けにGo開発チームなどが緊急修正を配布した。
「Firefox 158.0.1」を公開 - 脆弱性や侵害された中間証明書に対処
Mozilla Foundationは現地時間2026年10月20日、ウェブブラウザのセキュリティアップデート「Firefox 158.0.1」を公開した。複数の脆弱性を修正したほか、侵害された中間証明書を遮断するためのリストを更新している。
Nigerian national given 8-year sentence for tax business hacks
A Nigerian national who worked with a group to hack tax prep businesses and conduct millions of dollars in fraud using customer data was sentenced this week.
Eight eMudhra CA Keys Compromised, Triggering Emergency Fixes Across Browsers and Software
The private keys of eight eMudhra intermediate certificate authority (CA) certificates are compromised, Mozilla and Google's Chrome Root Program confirms on October 20. An intermediate CA signs the certificates that websites present, so anyone holding one of these keys could issue a certificate for any website that a browser would accept. A researcher reported the
Critical FortiSIEM Flaw Gets Public Exploit PoC for Unauthenticated Remote Code Execution
Cybersecurity researchers have released a proof-of-concept (PoC) exploit for a recently patched critical security flaw impacting Fortinet FortiSIEM that could result in arbitrary code execution. The vulnerability, tracked as CVE-2026-106173 (CVSS score: 9.4), is a critical path traversal flaw that could allow an unauthenticated attacker to execute unauthorized code or commands via specially
10月20日(火)
「Claude Agent SDK」に引数注入の脆弱性 - 修正版を公開
AnthropicのPython向け開発キット「Claude Agent SDK」に深刻な脆弱性が明らかとなった。修正版が公開されている。
Pegasus Spyware Infection Confirmed on Serbian University Rector's iPhone Days Before Election
The iPhone of Vladan Đokić, rector of the University of Belgrade and a prominent supporter of Serbia's student protest movement, was infected with NSO Group's Pegasus spyware in 2026, the Citizen Lab said on October 19. The finding came six days before Serbia's October 25 snap parliamentary election. The infection used a zero-click exploit, meaning Đokić did not have to tap a link or
AIペネトレーションテスト基盤「Cairn」の公開パネルから見えた攻撃活動についてまとめてみた
2026年10月19日、セキュリティ企業のNorForgeは、公開状態のまま放置されていたAIペネトレーションテスト基盤Cairnの管理画面から、AIエージェントによる攻撃活動を観測したとするレポートを公表しました。ここでは関連する情報をまとめます。 Cairnとは何か Cairnはオープンソースのエージェント基盤で、開発元のREADMEは汎用のAI状態空間探索エンジンであり、自律的なペネトレーションテストで最初に検証したと説明している(出典: 3)。Cairnでは1つのタスクを1つのプロジェクトとして扱い、各プロジェクトに起点(origin)と事前に定めた目標(goal)を設定する。エージェ…
WhatsApp Hid Instructions in Help Pages Telling Its AI Chatbot Not to Recommend Privacy Regulators
WhatsApp's help pages carried hidden instructions for its support chatbot that told it not to recommend a data protection authority or regulator to users who could no longer delete their accounts, even though WhatsApp's own privacy policy for Europe tells users they can complain to one. The text sat in the pages' code, never shown on screen, until it was removed by October 18. Whether the
What Security Teams Can Do To Tame Wild Code
A sales manager builds an AI-assisted workflow to route leads. It connects to customer records, summarizes inbound requests, and posts updates to a shared channel. The workflow saves time, reduces manual work, and soon becomes part of the team’s daily routine. Across the same organization, employees are building useful apps, agents, and automations faster than existing processes can support them
Go Issues Emergency Update Blocking Eight CA Keys Over Undisclosed Security Concerns
Go 1.27.3 and Go 1.26.10, released on October 20, make Go's certificate verifier reject any certificate chain that passes through one of eight intermediate certificate authority keys. Programs built on the new release will refuse connections to sites and services whose certificates were issued under those keys. The Go team says the keys belong to one certificate authority it has not
ConnectWise Resets Credentials as Cloud Backup Remains Offline After Security Incident
ConnectWise on Monday said it has taken remediation measures, including strengthening administrative-access protections and resetting accounts and replacing application credentials, as it continues to respond to a security incident that led to unauthorized access to application identities associated with Cloud Backup. The company said it has completed the following actions since it began
Hackers Hijack Five OVHcloud CLI Releases to Distribute Secret-Stealing Malware
An attacker used a contributor's GitHub account to replace the download archives on five existing releases of OVHcloud's command-line tool on Monday, October 19. The account had been hijacked, and the new files were a build designed to steal secrets stored on the disk of any machine that runs it, the cloud provider says. They were live on GitHub for up to 94 minutes, from 12:47 to 14:21 UTC,
大会形式を刷新、2月に「SECCON Tournament」開催
日本ネットワークセキュリティ協会（JNSA）のSECCON実行委員会は、2月にセキュリティ競技大会「SECCON Tournament」を都内で開催すると発表した。
ClickFix Attackers Exploit Siemens Software Center Flaw to Deploy Remote Access Trojan
Siemens has addressed a DLL sideloading vulnerability impacting Siemens Software Center that it said has been exploited in ClickFix attacks. The high-severity vulnerability, tracked as CVE-2026-110936 (CVSS v4 score: 8.4), could allow an attacker to place a specially-crafted DLL in a directory the application searches, resulting in execution of malicious code with the same privileges as the
「Roundcube Webmail」にセキュリティ更新 - 複数の脆弱性を解消
ウェブメールソフト「Roundcube Webmail」の開発チームは現地時間2026年10月19日、セキュリティアップデートとなる「同1.7.5」「同1.6.20」をリリースした。脆弱性の修正を行っており、利用者に注意を呼びかけている。
Ex-OpenAI Engineer Detained in Spy Device Case as Saudi Royal Contacts Emerge
A U.S. court on Monday granted the U.S. government's request to detain a former OpenAI engineer accused of planting a recording device in an executive conference room at the company's San Francisco office to allegedly steal sensitive secrets. In a new court filing Sunday, prosecutors revealed that Abdulrahman Alfozan, a 35-year-old Saudi national, was "in frequent communications via WhatsApp
Hackers Use New ROMULUS ClickFix Platform to Deliver LegionLoader and Other Malware
Cybersecurity researchers have disclosed details of a ClickFix delivery platform called ROMULUS that's being used to distribute malware such as Legion Loader. According to Forescout Research - Vedere Labs, ROMULUS is akin to a malware delivery service that employs ClickFix-style lures on bogus landing pages to trick unsuspecting users into running malicious commands and infecting their own
委託先が顧客のメアド保存のPCを紛失 - 山陰合同銀
山陰合同銀行は、委託先において顧客のメールアドレスが含まれるおそれがある業務用パソコンが所在不明となっていることを明らかにした。
ネットバンキングにログインしたまま別作業は危険？ 「ChatGPT Atlas」などのAIブラウザ7種でデータ窃取を検証
米ワシントン大学に所属する研究者らが発表した論文「Agentic Browsers and the Same-Origin Policy」は、AIエージェントがユーザーに代わってWeb操作を行うAIブラウザにおいて、メールやネットバンキングなどの機密情報が悪意あるサイトに窃取されるリスクを検証した研究報告だ。
気象庁の緊急地震速報の過大推定についてまとめてみた
2026年10月16日、気象庁は同日に北海道から中部地方へ発表した緊急地震速報(警報)について、マグニチュードを過大に推定したことによるものと公表しました。ここでは関連する情報をまとめます。 M6.9の地震がM9.9と推定され警報に 10月16日12時38分頃、カムチャツカ半島付近でM6.9(速報値)の地震が発生し、観測された最大震度は函館市の震度1だった。(出典: 2)緊急地震速報は12時38分27.7秒の第1報でM6.2と推定し、第14報(12時39分04.0秒)まではM6〜7台で推移した。12時39分23.6秒の第15報でM9.9となり、12時40分02.6秒の第17報で警報を発表した。…
Hackers Exploit Plex2Shell Flaws to Install Crypto Miners and Linux Proxy Backdoor
Threat actors have begun to exploit a chain of vulnerabilities in Plex Media Server to deploy cryptocurrency miners and reverse proxy software, a day after a proof-of-concept (PoC) went public. According to a researcher who goes by the online alias boredhackerblog, the exploitation activity involves chaining four different vulnerabilities, collectively called Plex2Shell. The vulnerabilities
Popular WordPress SEO Plugin Rank Math PRO Hijacked to Deliver Self-Restoring Backdoor
Copies of Rank Math PRO, the paid version of the Rank Math SEO plugin for WordPress, that were downloaded from rankmath.com or delivered as updates between 20:02 UTC on October 15 and 07:12 UTC on October 16 contained malware, Rank Math said in a security notice published on October 16. Any site that installed and activated one of those copies should be treated as compromised, and the
10月19日(月)
⚡ Weekly Recap: 98 Zero-Days, Rogue AI Agents, $100M Crypto Theft, 700 Supermarkets Hit and More
The worst problems don't always come with a warning. Sometimes they arrive through a service everyone trusts, a device someone bought, or a system nobody thought to check. By the time something looks wrong, the damage may already be done. This week had plenty of that. Trusted connections became a problem. Hardware wasn't as safe as it looked. Old bugs found new victims, and some systems were
GhostAction Attackers Plant Credential Stealer Disguised as Font in 94 GitHub Repositories
The threat actor behind the GhostAction supply chain attack has expanded beyond injecting malicious GitHub Actions workflows into compromised projects to phish open-source developers and deliver a stealer malware disguised within a fake font file. The latest evolution, detailed by OpenSourceMalware, signals that the attackers are actively refining their modus operandi in response to steps
From Email-to-Case to the Boardroom: How Inherited Agents Break Governance Built for Software
In Salesforce Agentforce, the recommended way to make an agent respond to events is a Flow: a record is created or a case is updated, and the Flow passes data into the agent's prompt. Separately, Email-to-Case and Web-to-Case turn inbound customer messages into case records; it is how airlines and hotels run support intake. Both are standard, documented, as-designed features. Chained together,
Fake Web3 Accelerator Uses npm Packages to Spread Malware and Hijack AI Agent Traffic
A fake Web3 accelerator has been observed pushing information stealers and backdoors to Windows and macOS systems using malicious npm packages under the pretext of offering free artificial intelligence (AI) credits for Anthropic Claude and Google Gemini, coding tools, and security audits. "The tools delivered information-stealing malware and backdoors for macOS and Windows machines," Elastic
Unpatched Broadcom Wi-Fi Flaw Lets Attackers in Range Run Code as Root on Routers
A flaw in Broadcom's Wi-Fi setup software lets an attacker within radio range run code as root on Broadcom-based routers, without the network password or any pairing step, security researcher Quentin Kaiser disclosed on October 16. He showed the attack working against home gateways supplied by three Belgian internet providers, in one case reading the Wi-Fi password off the device
「Fortinet」「BeyondTrust」の脆弱性悪用に注意喚起 - 米当局
米当局は、Fortinet製品やBeyondTrust製品に関する脆弱性2件が悪用されているとして、注意喚起を行った。
ホテル客室に隠したPCからのフィッシングメール送信事件についてまとめてみた
2026年10月15日、兵庫県警はホテルの客室に隠したパソコンからフィッシングメールを大量に送信した疑いで、中国籍の男を逮捕しました。ここでは関連する情報をまとめます。 客室の冷蔵庫の裏にPCを設置 兵庫県警は2026年10月15日、中国籍の無職の男(39、神戸市在住)を偽計業務妨害などの疑いで逮捕(出典: 2, 3)。逮捕容疑には建造物侵入も含まれる(出典: 6, 8)。県警は男の認否を明らかにしていない(出典: 2)。逮捕容疑は、2025年5月15日、氏名不詳者らと共謀し、客を装って神戸市中央区のホテルに侵入、客室内にあった冷蔵庫の裏へPCを隠して設置し、クレジットカード会社を装って偽サイ…
運営指定の遠隔操作ソフト導入を参加条件とされたセキュリティイベントについてまとめてみた
2026年10月12日、Elastic Security Labsは、暗号資産やWeb3の創業者を狙う偽のアクセラレーター「Apex Accelerator」が悪性のnpmパッケージで端末を狙っていたと公表しました。同じ名称の運営がTOKEN2049期間中の催しで参加の条件としてセキュリティ製品の導入を迫ったとする申告も出ています。ここでは関連する情報をまとめます。 偽アクセラレーターApex Accelerator Apex Acceleratorは、暗号資産やWeb3の創業者を狙う偽のアクセラレーター。Elastic Security Labsは追跡名REF8801として調査しており、「A…
【特別企画】メッセージングセキュリティの最新動向がテーマ - JPAAWGが年次イベント
2026年前半以降、予想を超えるAIの進化によってメールやメッセージングを取り巻くセキュリティ環境も目まぐるしく変化している。悪質化する攻撃に対し、グローバルではどのような対応が進められているのだろうか。
10月18日(日)
ConnectWise Suspends Cloud Backup After Attackers Compromise Microsoft 365 Tenants
ConnectWise on Saturday said it has disabled seven ConnectWise application identities as it continues its investigation into an incident in which unknown threat actors obtained unauthorized access to the application identities and compromised Microsoft 365 tenants. The disabled identities are listed below - ConnectWise Cloud Backup - 506e08f9-6e9a-4da4-942b-a099a03644ae ConnectWise
10月17日(土)
MALFEX npm Package 'imgdecode' Hides Shellcode Loader in Windows Native Addon
Cybersecurity researchers have discovered a malicious npm package that's part of a recently disclosed software supply chain attack campaign dubbed MALFEX. The package, named "imgdecode," was uploaded to the package registry on September 30, 2026, by a user named "malfexteste8." It has been downloaded 979 times as of writing and is still available on npm as of writing. The latest version of
Hackers Use Compromised ConnectWise Credential to Sign In to 173 Microsoft 365 Tenants
Cybersecurity researchers are sounding the alarm related to an active campaign in which unknown threat actors are abusing a compromised Microsoft 365 (M365) credential belonging to ConnectWise Cloud Backup (formerly SkyKick) to gain unauthorized access to customers' M365 environments. ConnectWise Cloud Backup is a cloud-based backup and recovery service built for managed service providers (MSPs
Researchers Demonstrate OpenBSD Root Exploit Chaining 37-Year-Old Shared-Memory Bug
A local privilege escalation exploit published today gains root on OpenBSD 7.9 by chaining a roughly 37-year-old integer overflow with a separate kernel flaw, bypassing OpenBSD's KARL kernel-address randomization and its SMAP and SMEP hardware protections.Security firm Calif, which found and reported the flaws, published a detailed writeup and full proof-of-concept code after OpenBSD shipped
Attackers Tampered with AOMEI Backupper's Update Servers for Minutes to Deliver a Backdoor
Attackers repeatedly changed the files that AOMEI Backupper fetches from the vendor's own update servers, in windows of five to ten minutes at a time between May and July 2026, so that any copy of the Windows backup program that checked for an update during one of those windows would download and run a backdoor. Google Threat Intelligence Group, Mandiant, and ManageEngine's Threat Analysis
UAT-11985 Uses Fake Event Invites to Target Taiwan Research Affiliates With Google AitM Phishing
Cybersecurity researchers have disclosed details of an advanced persistent threat (APT) spear-phishing campaign that has targeted individuals affiliated with Taiwan research organizations to direct victims to an adversary-in-the-middle (AitM) phishing framework designed to harvest their Google account credentials and multi-factor authentication (MFA) codes. The activity is being tracked by
10月16日(金)
OpenAI Research Model Spent 3rd-Party Test ETH Without Permission to Deploy Smart Contract
OpenAI has disclosed seven new incidents in which its artificial intelligence (AI) models exhibited misaligned behavior, including one case where its research model, after not having funds on an Ethereum test network, spent test cryptocurrency from a third-party's wallet without authorization to complete a coding task. The incident, the AI company said, involved an internal research model part
AI Decision Models and Their Impact on AI SOC Platforms
In the space of a month, a new category of AI model went from nonexistent to everywhere. TypeSafe AI released Jev on September 15 and called it a System One model, a nod to Kahneman's fast, intuitive thinking. OpenAI announced its own Decisions API at DevDay and opened a public beta on October 6. Cribl published cribl-decision, an open LoRA adapter you can run locally. Others, like Laya, are
China-Linked Hackers Exploited BeyondTrust Zero-Day to Take Over Remote Support Servers
The China-nexus cyber espionage group tracked as Armory Castle (previously UNC5221 or Warp Panda) exploited a newly disclosed security flaw in BeyondTrust Remote Support (formerly Bomgar) as a zero-day in late August 2026. The vulnerability, tracked as CVE-2026-102764 (CVSS score: 9.3), is a case of improper origin validation in an internal messaging component that could be exploited by a
CERT-In Warns AI Agents Accessed Sensitive Data at Indian Organizations During Testing
AI agents being tested online reached the live systems of Indian organizations and read business records, including personal data and confidential material, CERT-In said in an advisory on October 15. The agents went beyond their assigned tasks, and none of the organizations detected the unauthorized access. After internal reviews, the AI companies whose models were being tested
PEERSTITCH Malware Deployed via FortiOS Flaw Bypasses Checks on Tagged VPN Sessions
A suspected advanced threat actor has been observed exploiting a security flaw in Fortinet FortiOS to deliver a previously unreported memory-resident ARM64 malware known as PEERSTITCH. The attack involves the exploitation of CVE-2025-61624 (CVSS score: 5.4), a path traversal flaw in the command line interpreter of FortiOS, FortiPAM, FortiProxy, and FortiSwitchManager that could allow a
Critical PwnEscape Linux Kernel Vulnerability Lets Guest VMs Read Host Memory
A newly disclosed critical flaw in the Linux kernel allows code inside a virtual machine to read memory on the host computer it runs on. A researcher demonstrated the leak against Vercel's live cloud sandboxes, and Vercel confirmed it. The flaw, now tracked as CVE-2026-99999 and nicknamed PwnEscape, is in the Linux kernel's networking code, not in any one cloud's setup, so it reaches the shared
ThreatsDay: Adobe RCE, DNS Wallet Theft, NVIDIA Container Escape, Self-Healing Backdoor + 23 More
Someone built a tool to steal data, then decided it should scare the victim for fun. Yes, that’s an actual feature. And somehow, it fits right in with this week's security stories. The rest gets interesting in different ways. A small permission can lead to a big theft. A trusted login can hide the wrong person. Old bugs are finding new victims, familiar tools are being put to strange uses, and
Citizen Lab Traces Zero-Click Candiru Spyware Infections at Al Jazeera to Targeted Online Ads
Candiru, an Israeli maker of spyware sold to governments, infected devices at the news network Al Jazeera through ordinary online ads, in attacks that needed no click or other action from the user, researchers at the Citizen Lab said Thursday. The hidden attack code ran the moment an ad loaded on the screen, and in some cases the ad loaded out of sight, in the background. The Citizen