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A critical Windows kernel vulnerability, CVE-2026-40369, allows any unprivileged process, including a browser renderer sandbox, to increment arbitrary kernel memory and reliably escalate to SYSTEM on Windows 11 24H2–25H2. The bug sits in ntoskrnl.exe i…
Wrapped up another solid box with a clean chain from web exploitation to full host compromise.
Gained initial access through an IDOR vulnerability on the /user endpoint, which exposed an admin hash that cracked to wonderful1. This provided access to th…
Attackers are exploiting two Microsoft Defender vulnerabilities (CVE-2026-41091 and CVE-2026-45498), Microsoft acknowledged and CISA confirmed by adding them to its Known Exploited Vulnerabilities catalog. The vulnerabilities CVE-2026-41091 allows for …
The exploitation is mitigated by preventing the FsTx Auto Recovery Utility from starting when the WinRE image launches.
The post Microsoft Rolls Out Mitigations for ‘YellowKey’ BitLocker Bypass appeared first on SecurityWeek.
Microsoft is working on a fix for CVE-2026-45585 (aka “Yellowkey”), a vulnerability that can be used by attackers to bypass protections offered by BitLocker, the full-disk encryption feature built into Windows, and access users’ data….
Attackers are increasingly abusing Microsoft’s decades-old MSHTA utility to stealthily deliver stealers, loaders, and persistent malware through phishing, fake software downloads, and LOLBIN-based attack chains.
The post Legacy Windows Tool MSHTA Fuels…
It’s nasty, but it requires physical access to the computer:
The exploit, named YellowKey, was published earlier this week by a researcher who goes by the alias Nightmare-Eclipse. It reliably bypasses default Windows 11 deployments of BitLocker, the full-volume encryption protection Microsoft provides to make disk contents off-limits to anyone without the decryption key, which is stored in a secured piece of hardware known as a trusted platform module (TPM). BitLocker is a mandatory protection for many organizations, including those that contract with governments…
The researcher dropped the MiniPlasma exploit that uses the original proof-of-concept (PoC) code targeting the bug.
The post Researcher Drops MiniPlasma Windows Exploit for Unpatched 2020 CVE appeared first on SecurityWeek.
Microsoft has acknowledged a growing issue affecting Windows 11 users: the May 2026 cumulative update (KB5089549) fails to install, resulting in error code 0x800f0922. The problem is affecting systems running Windows 11 versions 24H2 and 25H2, raising …
MiniPlasma: a Windows SYSTEM privilege escalation believed patched in 2020 (CVE-2020-17103) is still fully working on every patched Windows 11. Once again, security researcher Chaotic Eclipse has released a proof-of-concept exploit for a new Windows privilege escalation zero-day called MiniPlasma, which can grant attackers SYSTEM privileges on fully patched systems. The flaw affects “cldflt.sys,” the […]