Latest cybersecurity reporting from selected sources.

Also: AscendEX Shuts Down; Ethereum Foundation on AI Bug HuntingThis week, Ostium paused trading, AscendEX shut down, Ethereum said AI hastens bug hunting, not verification, the United States charged an inmate over seized transfer, ex-Sheriff's deputy jailed for extortion, Tangem card security, Iran-linked wallets sanctions and the U.S. may drop BitClub charges.

Also: Former Hodlnaut CEO Charged and Stake DAO Hit by ExploitEvery week, ISMG rounds up cybersecurity incidents in digital assets. This week, the U.S. sanctioned Iran's largest exchange, ex-Hodlnaut CEO faced charges, the U.S. Securities and Exchange Commission sued over a $12.3M AI crypto scam and exploits hit Gravity Bridge, Stake DAO and Gnosis Pay.

Also, YellowKey Bypasses BitLocker, Škoda Breach, Kingdom Market Operator JailedThis week, U.S. lawmakers urged action on AI, a BitLocker exploit. Škoda, Nvidia’s GeForce NOW partner and telehealth firm OpenLoop reported breaches. Patch Tuesday. A dark market operator sentenced and pro-Ukraine and Iranian-linked hacking. Nitrogen ransomware attack on Foxconn.

CISA: Iran-Linked Groups Actively Exploiting OT Exposure Risks, PLC ProgrammersFederal agencies are warning that Iranian-linked actors have begun actively exploiting internet-facing PLCs and misconfigured OT systems across U.S. critical infrastructure, enabling network access, lateral movement and potential disruption amid rising geopolitical tensions.

Also, Lloyds Data Leak, Dutch Treasury Breach, Citrix Bug Exploit, Pay2Key ActivityThis week, Lloyds data leak hits 450K, Dutch treasury breach, Citrix flaw exploited, Iran-linked ransomware ops, TrueConf zero-day, Russian fraud ring sentenced, Romania targeted, patch gaps persist, and U.S. hospital breach affects 257K.

Experts Cite Prepositioning Risk in Iranian Cyber Operations Amid Escalating WarWarnings from Iranian-linked hacking groups targeting U.S. water systems highlight a growing risk of prepositioned cyber access and rapid attack activation, analysts told ISMG, as federal defenders confront rising geopolitical tensions and operational strain across critical infrastructure sectors.

Experts Cite Prepositioning Risk in Iranian Cyber Operations Amid Escalating WarWarnings from Iranian-linked hacking groups targeting U.S. water systems highlight a growing risk of prepositioned cyber access and rapid attack activation, analysts told ISMG, as federal defenders confront rising geopolitical tensions and operational strain across critical infrastructure sectors.

New Handala Site Is Also AvailableU.S. federal agents seized four web domains associated with Iranian hacking operations days after a threat actor going by Handala posted screenshots it said came from inside the IT systems of medical device manufacturer Stryker. The registrars used to create them are located in the United States.

Former DoD CIO Leslie Beavers on Nation-State Attacks and DefenseLeslie Beavers, retired brigadier general and former acting CIO and principal deputy CIO of the Department of Defense, said the United States is already experiencing a "cyber invasion," driven by coordinated activity from adversaries including Iran, China, Russia and North Korea.

Also: CISA Protocol Concerns, AI Agents Push Past Cybersecurity ControlsIn this week's panel, four ISMG editors unpacked the cyber dimensions of the Stryker attack amid the escalating Iran-Israel-U.S. tensions, the growing controversy around CISA leadership and alleged protocol breaches, and a new set of concerns related to AI agents bypassing security controls.

Chinese Hacking Firm iSoon and Iran's Emennet Pasargad Among TargetsThe European Union sanctioned three Chinese and Iranian hacking operations that have been under U.S. indictments or sanctions for over a year - or, in one case, since 2019. The sanctions freeze assets and forbid EU citizens and companies from funding or otherwise doing business with the targets.

Also: the Pentagon-Anthropic AI Legal Showdown, the New Reality of Document FraudIn this week's panel, four ISMG editors discuss the cyber activity tied to the U.S.-Israel-Iran conflict, the Pentagon's standoff with AI firm Anthropic and a new report that reveals how document fraud reflects deeper weaknesses in verification systems.

Tehran-Linked Handala Hackers Disrupt Medtech Giant Stryker, Claim Verifone BreachAs the United States and Israel continue their war with Iran, Tehran-linked hacking group Handala has entered the fray, claiming credit for wiping systems at medical technology firm Stryker, which confirmed the attack, as well as breaching payment device maker Verifone, which denied being breached.

Healthcare Hit Shows Symbols Matter as Iran Shifts Focus to Economic DamageCybersecurity experts say that the Handala "hacktivist" group that claimed credit for attacks against two American firms on Wednesday is run by the Iranian government. The shift to destructive cyberattacks parallels Iran's attempt to inflict greater economic damage on the United States and allies.

Experts Urge Preparedness, Nonstop Vigilance, See Ongoing Risk of Online ReprisalsSeven days into the United States and Israel continuing "major combat operations" against Iran, Tehran continues to respond with kinetic attacks against neighboring countries. While no cyberattacks have emerged, experts see unpredictability and continue to urge caution, monitoring and preparedness.

Also: Anthropic Claude Code Security Impact on AppSec, RSAC Conference PreviewIn this week's panel, four ISMG editors discuss the potential cyber spillover from escalating tensions in the Iran-Israel-U.S. conflict, the market disruption sparked by Anthropic's Claude Code Security launch and a preview of RSAC Conference 2026.

Separately, Iran Tied to IP Camera Hacks for Targeting and Battle Damage AssessmentU.S. military cyber operations underpinned the first part of the country's joint strike with Israel against Iran on Saturday. Since then, experts see signs of at least low-level cyber operations to support intelligence-gathering for kinetic attack targeting.

Iranian Cyberespionage Group MuddyWater Goes DarkPhysical effects rather than cyber strikes are triggering Middle Eastern connectivity problems during day four of a sustained U.S. and Israeli bombing campaign against Iran. Iran is responding with drone and missile attacks targeting U.S. military as well as British bases in Bahrain, Cyprus.

Nation-State Hackers Sheltering From Bombs or Cut Off From InternetIranian cyber proxies are girding for revenge while nation-state hackers in Tehran have gone quiet, whether to shelter from an onslaught of missile attacks or because the Middle Eastern country remains disconnected from the global internet on the third day of a U.S. and Israeli bombing campaign.

Experts Warn of DDoS, Ransomware, Proxy And Other Attacks on Health SectorThe escalating conflict emerging from the U.S. and Israel military strikes this weekend on Iran, which killed the country's top leadership and crippled its internet connectivity, could erupt into cyberattacks against the healthcare sector by Iranian sympathizers and proxies, experts warn.