Vulnerabilities

A big increase in scanning across the internet for SonicWall firewall management interface has been observed. GreyNoise, a threat intelligence company, found a big increase in scans of SonicWall SonicOS management APIs from May 9 to May 18, 2026. The most notable spike occurred on May 12, when approximately 597,000 …

Splunk has put out security updates for many flaws in Splunk Enterprise, Splunk Cloud Platform, and the Splunk AI Toolkit. These issues could cause denial-of-service (DoS) attacks and expose sensitive information. The flaws revealed on May 20, 2026, have three known weaknesses: CVE-2026-20238, CVE-2026-20239, and CVE-2026-20240. Organizations should quickly apply …

A security flaw dubbed nginx-poolslip has been revealed in NGINX version 1.31.0, the newest stable version of the most used web server software. The discovery, made by security researcher Vega of the NebSec security team, was announced via X (formerly Twitter) on May 21, 2026, sending shockwaves through the global …

Two new Microsoft Defender flaws have been found, and they are being used by attackers. This allows local attackers to gain SYSTEM level access and could interrupt protection on Windows systems. The bugs are called CVE‑2026‑41091 (Elevation of Privilege) and CVE‑2026‑45498 (Denial of Service). They were shared on May 19, …

The Gentlemen ransomware group has quickly become one of the most active and growing cybercrime threats since it was first seen in late 2025. The Gentlemen is unique because it has the capability to attack with many types of systems, such as Windows, Linux, NAS, BSD, and VMware ESXi. Attack …

A cybersecurity researcher has shared a PoC for a Windows flaw called “MiniPlasma.” This lets attackers get SYSTEM privileges on fully updated Windows systems. The exploit was shared by a researcher called Chaotic Eclipse, or Nightmare Eclipse. They released the source code and a working file on GitHub after saying …

A new security flaw affecting NGINX Plus and NGINX Open is being used by hackers days after it was made public, according to VulnCheck. The flaw, known as CVE-2026-42945 (CVSS score: 9.2), is a heap buffer overflow in the ngx_http_rewrite_module that affects NGINX versions 0.6.27 to 1.30.0. An AI security …

A series of four security flaws found in OpenClaw, a rapidly growing open-source platform for self-operating AI agents, has put about 245,000 public server instances at risk of being hacked, having credentials stolen, and being installed with secret backdoors. Originally started as “Clawdbot” in late 2025, OpenClaw links big language …

A critical flaw in Palo Alto Networks PAN-OS is putting business firewalls at risk. It lets unverified attackers run any code they want with full control. Tracked as CVE-2026-0300 is a buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software which …

Ivanti has put out its May 2026 Patch Tuesday security updates. They found flaws in four products. They also said that AI tools are helping their engineers find mistakes that regular scanners miss. They warned that AI finding issues will probably lead to more flaws being reported in the future. …