https://itdef.net/ja/learn/and-st-data-breach-2026ITDja2026-10-24アンドエスティHDの不正アクセス（顧客情報 約250万件）：流出の可能性がある項目と、会員がやること https://itdef.net/ja/learn/arista-velocloud-orchestrator-vulnerabilities-2026ITDja2026-10-24VeloCloud Orchestrator脆弱性 CVE-2026-114625（悪用確認）｜修正版と確認すること https://itdef.net/ja/learn/blastmail-unauthorized-access-2026ITDja2026-10-24メール配信「ブラストメール」に不正アクセス（全契約者の情報と、344契約で配信先リストなど）：メルマガの受信者と利用企業がやること https://itdef.net/ja/learn/exploited-edge-device-vulnerabilities-2026-10ITDja2026-10-24悪用が確認された境界機器の脆弱性まとめ（2026年10月中旬）｜Ivanti・PAN-OS・FortiOS・Cisco https://itdef.net/ja/learn/medley-atlink-unauthorized-access-2026ITDja2026-10-24メドレーの医療機関向けシステム「アットリンク」に不正アクセス：患者の氏名・誕生月日・ログインID・パスワードなどが漏えい、患者と医療機関がやること https://itdef.net/ja/learn/nikkei-data-breach-2026ITDja2026-10-24日本経済新聞社の不正アクセス（約183万件）：氏名・メールアドレスなど約15万件が漏えい、利用者がやること https://itdef.net/ja/learn/python-pip-certifi-emudhra-ca-2026ITDja2026-10-24eMudhra（emSign）の中間証明書の鍵が弱く割り出せた件で、Pythonの利用者がやること：pip・certifi・uvの更新と確認 https://itdef.net/ja/learn/railway-secrets-exposure-2026ITDja2026-10-24Railwayの環境変数が漏えいした可能性（2026年10月、最大1.85%のワークスペース）：入れ替える秘密と、利用者がやること https://itdef.net/ja/learn/siteguard-server-edition-vulnerability-cve-2026-106931ITDja2026-10-24SiteGuard Server Edition脆弱性 CVE-2026-106931（悪用確認）｜対象の確かめ方と対策 https://itdef.net/ja/learn/treasure-factory-data-breach-2026ITDja2026-10-24トレジャー・ファクトリー（トレファク）の不正アクセス（メールアドレス74万6,277件）：出張買取・トレファク引越の利用者がやること https://itdef.net/ja/learn/capcom-data-breach-2026ITDja2026-10-23カプコンのCAPCOM IDへの不正アクセス（11,774,247件）：メールアドレスなどが漏えい、利用者がやること https://itdef.net/ja/learn/onamae-desktop-cloud-unauthorized-access-2026ITDja2026-10-23お名前.com デスクトップクラウド（GMOインターネット）への不正アクセス（影響の可能性があるサーバー26,739件）：取引口座のログイン情報が悪用された可能性と、FX・証券の利用者が今日やること https://itdef.net/ja/learn/litellm-supply-chain-compromise-2026ITDja2026-10-22LiteLLM 1.107.0に認証情報を盗むマルウェアが混入（2026年10月）：対象のPyPI版・Dockerイメージと、利用者がやること https://itdef.net/ja/learn/cmoa-data-breach-2026ITDja2026-10-23コミックシーモアの会員情報流出（最大約420万件・ログファイル上の情報）：メールアドレスや生年月日などが流出、利用者がやること https://itdef.net/ja/learn/iwaicosmo-securities-unauthorized-access-2026ITDja2026-10-23岩井コスモ証券の委託先への不正アクセス（4,975名）：漏れた情報と意図しない売買注文、顧客がやること https://itdef.net/ja/learn/ymirlink-cuenote-fc-unauthorized-access-2026ITDja2026-10-23ユミルリンクのメール配信「Cuenote FC」に不正アクセス（延べ約900万件）：メールアドレスなどの持ち出しと、メルマガの受信者・利用企業がやること https://itdef.net/ja/learn/carsensor-data-breach-2026ITDja2026-10-22リクルートのカーセンサーnet・C-MATCHへの不正アクセス（最大3,709,551件）：問い合わせた人の氏名・住所などが漏えいした可能性、利用者と販売店がやること https://itdef.net/en/learn/and-st-data-breach-2026ITDen2026-10-24and ST HD breach (about 2.5 million customer records): what may have leaked and what members should do https://itdef.net/en/learn/arista-velocloud-orchestrator-vulnerabilities-2026ITDen2026-10-24VeloCloud Orchestrator CVE-2026-114625 exploited: fixed versions and what to check https://itdef.net/en/learn/blastmail-unauthorized-access-2026ITDen2026-10-24Unauthorized Access to the blastmail Email Delivery Service (All Customers' Account Data, and Mailing Lists and Similar Data for 344 Contracts): What Newsletter Recipients and Client Organizations Should Do https://itdef.net/en/learn/exploited-edge-device-vulnerabilities-2026-10ITDen2026-10-24Exploited edge device vulnerabilities, mid-October 2026: Ivanti, PAN-OS, FortiOS, Cisco https://itdef.net/en/learn/medley-atlink-unauthorized-access-2026ITDen2026-10-24Unauthorized Access to Medley's Clinic System @link (at-link): Patients' Names, Birth Dates, Login IDs and Passwords Leaked — What Patients and Clinics Should Do https://itdef.net/en/learn/nikkei-data-breach-2026ITDen2026-10-24Nikkei Unauthorized Access (About 1.83 Million Records): Names, Email Addresses and More Leaked in About 150,000 — What Users Should Do https://itdef.net/en/learn/python-pip-certifi-emudhra-ca-2026ITDen2026-10-24eMudhra (emSign) intermediate CA keys compromised: what Python users need to do about pip, certifi and uv https://itdef.net/en/learn/railway-secrets-exposure-2026ITDen2026-10-24Railway Environment Variables Possibly Exposed (October 2026, Up to 1.85% of Workspaces): Which Secrets to Rotate and What Users Should Do https://itdef.net/en/learn/siteguard-server-edition-vulnerability-cve-2026-106931ITDen2026-10-24SiteGuard Server Edition CVE-2026-106931 exploited: who is affected and what to do https://itdef.net/en/learn/treasure-factory-data-breach-2026ITDen2026-10-24Treasure Factory (Trefac) breach (746,277 email records): what home-buyback and Trefac Moving customers should do https://itdef.net/en/learn/capcom-data-breach-2026ITDen2026-10-23Capcom CAPCOM ID Breach (11,774,247 Records): Email Addresses and Login Data Leaked — What Account Holders Should Do https://itdef.net/en/learn/onamae-desktop-cloud-unauthorized-access-2026ITDen2026-10-23Unauthorized Access to Onamae.com Desktop Cloud (GMO Internet) (26,739 Servers Possibly Affected): Trading Account Logins May Have Been Misused, and What FX and Securities Traders Should Do Today https://itdef.net/en/learn/litellm-supply-chain-compromise-2026ITDen2026-10-22LiteLLM 1.107.0 Shipped a Credential Stealer (October 2026): Affected PyPI Release and Docker Images, and What Users Should Do https://itdef.net/en/learn/cmoa-data-breach-2026ITDen2026-10-23Comic Cmoa Member Data Breach (Up to About 4.2 Million Records in Log Files): Email Addresses and Dates of Birth Leaked — What Users Should Do https://itdef.net/en/learn/iwaicosmo-securities-unauthorized-access-2026ITDen2026-10-23Iwai Cosmo Securities vendor breach (4,975 customers): what leaked, the unintended trades, and what customers should do https://itdef.net/en/learn/ymirlink-cuenote-fc-unauthorized-access-2026ITDen2026-10-23Unauthorized Access to Ymirlink's Cuenote FC Email Delivery Service (About 9 Million Cumulative Records): What Was Taken, and What Newsletter Recipients and Client Companies Should Do https://itdef.net/en/learn/carsensor-data-breach-2026ITDen2026-10-22Recruit Carsensor.net and C-MATCH Breach (Up to 3,709,551 Records): Names and Addresses of People Who Contacted Dealers May Be Exposed — What Users and Dealers Should Do