Privilege Escalation
New Windows LegacyHive zero-day gives hackers admin privileges
A security researcher using the “Nightmare Eclipse” handle has released a Windows zero-day exploit dubbed LegacyHive that allows attackers to escalate privileges on up-to-date Windows systems. Nightmare Eclipse published a proof-of-concept (PoC) exploit hours after Microsoft released its July 2026 Patch Tuesday updates, saying that it abuses a security vulnerability in the Windows User Profile […]
Microsoft patches RoguePlanet Defender zero-day vulnerability
Microsoft has released a security patch to address a Defender zero-day vulnerability known as “RoguePlanet,” disclosed after the June 2026 Patch Tuesday. The flaw (tracked as CVE-2026-50656) was disclosed by a security researcher using the “Nightmare Eclipse” handle as part of an ongoing dispute with Microsoft over the company’s bug bounty and vulnerability disclosure practices. They […]
CISA: Windows BlueHammer flaw now exploited by ransomware gangs
CISA confirmed on Monday that ransomware gangs have begun exploiting a high-severity Microsoft Defender privilege escalation vulnerability that has previously been abused in zero-day attacks. Dubbed BlueHammer, the security flaw (CVE-2026-33825) was leaked by a security researcher known as “Nightmare Eclipse” in early April, together with proof-of-concept exploit code, in protest at how the Microsoft Security Response […]
Microsoft working on Defender patch for RoguePlanet zero-day
Microsoft confirmed that it’s working on a security patch for a Defender zero-day vulnerability named “RoguePlanet,” disclosed one week ago. The security researcher who published a RoguePlanet exploit during the June 2026 Patch Tuesday (known as Nightmare Eclipse) said it affects fully patched Windows 10 and Windows 11 devices and allows attackers to spawn command prompts with […]
Critical Fortinet FortiSandbox flaws now exploited in attacks
Attackers are now exploiting several critical vulnerabilities in Fortinet’s FortiSandbox cyber threat detection platform, according to threat intelligence company Defused. Fortinet released security updates for these three critical-severity security flaws (tracked as CVE-2026-39813, CVE-2026-39808, and CVE-2026-25089) on April 14. These flaws allow unauthenticated threat actors to escalate privileges and execute unauthorized code remotely through low-complexity command injection attacks […]
Cisco warns of unpatched SD-WAN zero-day exploited in attacks
On Thursday, Cisco warned of a high-severity, unpatched zero-day in the Cisco Catalyst SD-WAN Manager (tracked as CVE-2026-20245) actively exploited in attacks enabling root privilege escalation. The zero-day flaw impacts all deployment types, including On-Prem Deployment, Cisco SD-WAN Cloud-Pro, Cisco SD-WAN Cloud (Cisco Managed), and Cisco SD-WAN for Government (FedRAMP). In a Thursday advisory, Cisco said the […]
Microsoft warns of new Defender zero-days exploited in attacks
On Wednesday, Microsoft started rolling out security patches for two Defender vulnerabilities that have been exploited in zero-day attacks. The first one, tracked as CVE-2026-41091, is a privilege escalation security flaw affecting Microsoft Malware Protection Engine 1.1.26030.3008 and earlier, which provides the scanning, detection, and cleaning capabilities for Microsoft antivirus and antispyware software. This flaw stems […]
Exploit released for new PinTheft Arch Linux root escalation flaw
A recently patched Linux privilege escalation vulnerability now has a publicly available proof-of-concept (PoC) exploit that allows local attackers to gain root privileges on Arch Linux systems. The vulnerability, named PinTheft by the V12 security team and still waiting to be assigned a CVE ID for easier tracking, exists in the Linux kernel’s RDS (Reliable […]
Exploit available for new DirtyDecrypt Linux root escalation flaw
A recently patched local privilege escalation vulnerability in the Linux kernel’s rxgk module now has a proof-of-concept exploit that allows attackers to gain root access on some Linux systems. Named DirtyDecrypt and also known as DirtyCBC, this security flaw was also autonomously found and reported by the V12 security team earlier this month, when the […]
New Fragnesia Linux flaw lets attackers gain root privileges
Linux distros are rolling out patches for a new high-severity kernel privilege escalation vulnerability that allows attackers to run malicious code as root. Known as Fragnasia and tracked as CVE-2026-46300, this security flaw stems from a logic bug in the Linux XFRM ESP-in-TCP subsystem that can enable unprivileged local attackers to gain root privileges by writing arbitrary bytes […]