Hackers leverage new Microsoft SharePoint exploit in attacks
A proof-of-concept (PoC) exploit for a critical Microsoft SharePoint vulnerability, published by cybersecurity company Rapid7 on Tuesday, is already being used in attacks. Tracked as CVE-2026-55040, this authentication bypass security flaw in the JWT token validation pipeline can be exploited by attackers without privileges to perform operations as a SharePoint site user or administrator. Microsoft patched […]
Signal adds new security feature to thwart man-in-the-middle attacks
Signal has introduced Automatic Key Verification, a new security feature that gives users a new way to ensure their encrypted chats haven’t been intercepted. The new feature is part of a “key transparency” system that uses Cloudflare and Trail of Bits as trusted third-party independent auditors to verify the integrity of Signal conversations. “It works through a […]
New Microsoft Defender ‘ShieldBreak’ zero-day grants SYSTEM privileges
A security researcher known as Nightmare Eclipse has released a new Microsoft Defender zero-day exploit named “ShieldBreak” after Microsoft released the August 2026 Patch Tuesday security updates. The new vulnerability is described as a bypass for RoguePlanet, another Defender privilege escalation flaw disclosed in June and patched by Microsoft one month later. However, cybersecurity expert Kevin […]
Google says Chrome cuts 7 billion unwanted Android notifications a day to fight abuse
Google says Chrome’s anti-abuse systems reduced unwanted notifications on Android by more than 7 billion per day during the first quarter of 2026. In a new blog post, Google argues that notification abuse has increasingly been used to distribute scams, malware, phishing attempts, and fraudulent payment requests. To reduce the abuse, Google developed a “Swiss […]
DeadLock ransomware uses blockchain to resist infrastructure takedown
The DeadLock ransomware operation is using a decentralized infrastructure that relies on blockchain-backed services to protect its communication with victims and data-leak activity. The threat actor emerged in mid-2025 and uses double-extortion tactics (data theft/leak and file encryption) to pressure victims into paying a ransom. By July this year, DeadLock’s data leak site listed 80 organizations, mostly from […]
Sandworm hackers target IT pros with trojanized WireGuard VPN client
Hackers associated with the Russian threat group Sandworm have been targeting system administrators and IT professionals through fake job offers since at least May. A report from the Ukrainian Computer Emergency Response Team (CERT) details a social engineering campaign attributed to UAC-0145, which is believed to be a sub-cluster of Sandworm (APT44). In the campaign, […]
Cisco warns of ASA and FTD VPN flaw exploited to crash devices
Cisco is warning that a high-severity denial-of-service vulnerability in Secure Firewall ASA and Threat Defense (FTD) software is being actively exploited in attacks to remotely crash affected devices. The flaw, tracked as CVE-2026-20349, has a severity score of 8.6 and impacts devices running Cisco Secure Firewall Adaptive Security Appliance (ASA) or Secure Firewall Threat Defense […]
Delta probes Wi-Fi deauth attack on flight carrying DEF CON attendees
Delta Air Lines is investigating an unauthorized Wi-Fi network that appeared aboard a flight from Las Vegas to Atlanta carrying passengers who had attended the DEF CON hacker convention. ​The company told GeekFeed that the incident occurred yesterday on Flight 591 and did not affect the safety of the passengers or aircraft operating systems. “We […]
Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days
Today is Microsoft’s August 2026 Patch Tuesday, and with it comes security updates for a massive 400 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities. Patch Tuesday addresses 42 “Critical” vulnerabilities, 37 of which are remote code execution and 5 are elevation of privilege. The approximate number of bugs in each vulnerability category is […]
Windows 11 KB5121003 & KB5120240 cumulative updates released
Microsoft has released Windows 11 KB512103 and KB5120240 cumulative updates for versions 25H2/24H2 and 23H2 to fix security vulnerabilities, bugs, and add new features. Today’s updates are mandatory as they contain the August 2026 Patch Tuesday security patches for 400 vulnerabilities discovered in previous months. You can install today’s update by going to Start > Settings > Windows Update and clicking on ‘Check for Updates.’ You can also manually download and […]