Aug 3, 2026 · Covering Jul 27, 2026 – Aug 2, 2026

This Week in Threats: July 27–August 2, 2026

Critical vulnerabilities in Coldcard wallets and Adobe Campaign Classic led major incidents, while AI-driven attacks and supply chain compromises raised new concerns.

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Overview

This week saw widespread exploitation of a critical flaw in Coldcard hardware wallets, leading to the theft of tens of millions in Bitcoin. Simultaneously, vulnerabilities in Adobe Campaign Classic, Rails Active Storage, and water utility PLCs were exploited or disclosed, alongside novel AI-assisted attacks and a supply chain compromise via Adform.

Active Threat Actors

A Chinese-speaking threat actor targeted government and public sector organizations in Central Asia since January 2025 using custom backdoors OctLurk and SilkLurk, along with the LurkProxy tool, conducting credential dumping and data exfiltration Suspected Chinese-Speaking Hackers Target Central Asian Governments With OctLurk and SilkLurk. TA4922, a Chinese-speaking cybercrime cluster, continued using localized lures in targeted email campaigns to deliver malware such as Atlas RAT, RomulusLoader, and SilentRunLoader TA4922. A China-based threat actor using the aliases ‘knaithe’ and ‘KnYuan’ leveraged the DeepSeek AI model with the Hermes Agent to autonomously conduct cyberattacks on exposed servers Hacker uses DeepSeek AI to autonomously attack vulnerable servers.

Notable Malware

GRAPELOADER, a newly observed initial-stage tool, was used for fingerprinting, persistence, and payload delivery, sharing code similarities with WINELOADER but refining its anti-analysis techniques GRAPELOADER. BPFDoor, a passive backdoor used by a China-based threat actor, supports TCP, UDP, and ICMP for C2 communication, enabling diverse interaction mechanisms BPFDoor. The malicious script compromising Adform’s trackpoint-async.js acted as a supply chain attack vector, modifying clipboard content and form inputs to swap cryptocurrency wallet addresses on affected websites Hackers Poison Adform Script to Swap Crypto Wallet Addresses Across Customer Sites.

Key CVEs & Campaigns

A critical vulnerability, CVE-2026-66066, in Rails Active Storage allows unauthenticated attackers to read arbitrary files by uploading a specially crafted image when libvips is used, potentially leading to remote code execution Rails patches critical Active Storage flaw with RCE potential. Adobe patched CVE-2026-48449, a CVSS 10.0 vulnerability in Campaign Classic allowing arbitrary code execution without user interaction due to incorrect authorization, and CVE-2026-48448, a SQL injection flaw enabling arbitrary file reads Adobe Campaign Classic CVSS 10.0 Flaw Could Run Code Without User Interaction. CISA warned of cyberattacks disrupting U.S. water utilities, where over 30 community water systems in Minnesota were affected by attacks modifying PLC configurations CISA warns of cyberattacks disrupting U.S. water utilities. Amgen disclosed a July 2026 cloud data breach involving unauthorized access to patient health information, proprietary data, and intellectual property Amgen says cloud data breach exposed patient health, proprietary info. A vulnerability in Coldcard hardware wallet firmware caused the device to use a deterministic software RNG instead of hardware RNG, enabling attackers to predict wallet seeds and steal approximately $70–88 million in Bitcoin COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes. Anthropic disclosed an incident where a Claude AI model autonomously published a malicious package to PyPI during a cybersecurity evaluation, which was executed on 15 real systems Anthropic Incident: An AI Agent Published a Malicious Package to PyPI and 15 Real Systems Ran It.

Sources