DoS
Fake ad blocker extension crashes the browser for ClickFix attacks
A malvertising campaign is using a fake ad-blocking Chrome and Edge extension named NexShield that intentionally crashes the browser in preparation for ClickFix attacks. The attacks were spotted earlier this month and delivered a new Python-based remote access tool called ModeloRAT that is deployed in corporate environments. The NexShield extension, which has been removed from the Chrome Web Store, was […]
UK govt. warns about ongoing Russian hacktivist group attacks
The U.K. government is warning of continued malicious activity from Russian-aligned hacktivist groups targeting critical infrastructure and local government organizations in the country in disruptive denial-of-service (DDoS) attacks. The attacks are aimed at taking websites offline and disabling services, the UK’s National Cyber Security Centre (NCSC) says in an alert today. Despite lacking sophistication, a DDoS attack […]
Palo Alto Networks warns of DoS bug letting hackers disable firewalls
Palo Alto Networks patched a high-severity vulnerability that could allow unauthenticated attackers to disable firewall protections in denial-of-service (DoS) attacks. Tracked as CVE-2026-0227, this security flaw affects next-generation firewalls (running PAN-OS 10.1 or later) and Palo Alto Networks’ Prisma Access configurations when the GlobalProtect gateway or portal is enabled. The cybersecurity company says that most […]
New Windows RasMan zero-day flaw gets free, unofficial patches
Free unofficial patches are available for a new Windows zero-day vulnerability that allows attackers to crash the Remote Access Connection Manager (RasMan) service. RasMan is a critical Windows system service that starts automatically, runs in the background with SYSTEM-level privileges, and manages VPN, Point-to-Point Protocol over Ethernet (PPoE), and other remote network connections. ACROS Security […]
New SonicWall SonicOS flaw allows hackers to crash firewalls
American cybersecurity company SonicWall urged customers today to patch a high-severity SonicOS SSLVPN security flaw that can allow attackers to crash vulnerable firewalls. Tracked as CVE-2025-40601, this denial-of-service vulnerability is caused by a stack-based buffer overflow impacting Gen8 and Gen7 (hardware and virtual) firewalls. “A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a […]
Cisco: Actively exploited firewall flaws now abused for DoS attacks
Cisco warned this week that two vulnerabilities, which have been used in zero-day attacks, are now being exploited to force ASA and FTD firewalls into reboot loops. The tech giant released security updates on September 25 to address the two security flaws, stating that CVE-2025-20362 enables remote threat actors to access restricted URL endpoints without authentication, while CVE-2025-20333 allows authenticated attackers […]
Cisco warns of IOS zero-day vulnerability exploited in attacks
Cisco has released security updates to address a high-severity zero-day vulnerability in Cisco IOS and IOS XE Software that is currently being exploited in attacks. Tracked as CVE-2025-20352, the flaw is due to a stack-based buffer overflow weakness found in the Simple Network Management Protocol (SNMP) subsystem of vulnerable IOS and IOS XE software, impacting […]
Elastic rejects claims of a zero-day RCE flaw in Defend EDR
Enterprise search and security company Elastic is rejecting reports of a zero-day vulnerability impacting its Defend endpoint detection and response (EDR) product. The company’s statement follows a blog post from a company called AshES Cybersecurity claiming to have discovered a remote code execution (RCE) flaw in Elastic Defend that would allow an attacker to bypass EDR protections. Elastic’s […]
Netherlands: Citrix Netscaler flaw CVE-2025-6543 exploited to breach orgs
The Netherlands’ National Cyber Security Centre (NCSC) is warning that a critical Citrix NetScaler vulnerability tracked as CVE-2025-6543 was exploited to breach “critical organizations” in the country. The critical flaw is a memory overflow bug that allows unintended control flow or a denial of service state on impacted devices. “Memory overflow vulnerability leading to unintended control […]
Apple ‘AirBorne’ flaws can lead to zero-click AirPlay RCE attacks
A set of security vulnerabilities in Apple’s AirPlay Protocol and AirPlay Software Development Kit (SDK) exposed unpatched third-party and Apple devices to various attacks, including remote code execution. According to cybersecurity company Oligo Security security researchers who discovered and reported the flaws, they can be exploited in zero-click and one-click RCE attacks, man-in-the-middle (MITM) attacks, […]