Mitigation
Microsoft shares mitigation for YellowKey Windows zero-day
Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives. The security flaw was disclosed last week by an anonymous security researcher known as ‘Nightmare Eclipse,’ who described it as a backdoor and published a proof-of-concept (PoC) exploit. Nightmare Eclipse said that exploiting this zero-day involves placing specially […]
Microsoft warns of Exchange zero-day flaw exploited in attacks
On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. Microsoft describes this security flaw (CVE-2026-42897) as a spoofing vulnerability affecting up-to-date Exchange Server 2016, Exchange Server 2019, and Exchange Server Subscription […]
Microsoft asks admins to reach out for Windows IIS failures fix
Microsoft has asked businesses to reach out for advice on how to temporarily mitigate a known Message Queuing (MSMQ) issue causing enterprise apps and Internet Information Services (IIS) sites to fail. MSMQ is an optional Windows service commonly used in enterprise environments that helps apps communicate over a network. The known issue mainly affects enterprise users with Windows 10 22H2, Windows […]
Microsoft “mitigates” Windows LNK flaw exploited as zero-day
Microsoft has silently “mitigated” a high-severity Windows LNK vulnerability exploited by multiple state-backed and cybercrime hacking groups in zero-day attacks. Tracked as CVE-2025-9491, this security flaw allows attackers to hide malicious commands within Windows LNK files, which can be used to deploy malware and gain persistence on compromised devices. However, the attacks require user interaction to […]
Cloudflare blocks record 7.3 Tbps DDoS attack against hosting provider
Cloudflare says it mitigated a record-breaking distributed denial of service (DDoS) attack in May 2025 that peaked at 7.3 Tbps, targeting a hosting provider. DDoS attacks flood targets with massive amounts of traffic with the sole aim to overwhelm servers and create service slowdowns, disruptions, or outages. This new attack, which is 12% larger than […]
New Ubuntu Linux security bypasses require manual mitigations
Three security bypasses have been discovered in Ubuntu Linux’s unprivileged user namespace restrictions, which could be enable a local attacker to exploit vulnerabilities in kernel components. The issues allow local unprivileged users to create user namespaces with full administrative capabilities and impact Ubuntu versions 23.10, where unprivileged user namespaces restrictions are enabled, and 24.04 which has […]
Microsoft: Outdated Exchange servers fail to auto-mitigate security bugs
Microsoft says outdated Exchange servers cannot receive new emergency mitigation definitions because an Office Configuration Service certificate type is being deprecated. Emergency mitigations (also known as EEMS mitigations) are delivered via the Exchange Emergency Mitigation Service(EEMS), introduced three years ago in September 2021. EEMS automatically applies interim mitigations for high-risk (and likely actively exploited) security flaws […]
CISA: Network switch RCE flaw impacts critical infrastructure
U.S. cybersecurity agency CISA is warning about two critical vulnerabilities that allow authentication bypass and remote code execution in Optigo Networks ONS-S8 Aggregation Switch products used in critical infrastructure. The flaws concern weak authentication problems, allowing bypassing of password requirements, and user input validation issues potentially leading to remote code execution, arbitrary file uploads, and directory […]