Zero-Day
Samsung patches actively exploited zero-day reported by WhatsApp
Samsung has patched a remote code execution vulnerability that was exploited in zero-day attacks targeting its Android devices. Tracked as CVE-2025-21043, this critical security flaw affects Samsung devices running Android 13 or later and was reported by the security teams of Meta and WhatsApp on August 13. As Samsung explains in a recently updated advisory, this […]
Microsoft September 2025 Patch Tuesday fixes 81 flaws, two zero-days
Today is Microsoft’s September 2025 Patch Tuesday, which includes security updates for 81 flaws, including two publicly disclosed zero-day vulnerabilities. This Patch Tuesday also fixes nine “Critical” vulnerabilities, five of which are remote code execution vulnerabilities, 1 is information disclosure, and 2 are elevation of privileges. The number of bugs in each vulnerability category is listed […]
Hackers exploited Sitecore zero-day flaw to deploy backdoors
Threat actors have been exploiting a zero-day vulnerability in legacy Sitecore deployments to deploy WeepSteel reconnaissance malware. The flaw, tracked under CVE-2025-53690, is a ViewState deserialization vulnerability caused by the inclusion of a sample ASP.NET machine key in pre-2017 Sitecore guides. Some customers reused this key in production, allowing attackers with knowledge of the key […]
New TP-Link zero-day surfaces as CISA warns other flaws are exploited
TP-Link has confirmed the existence of an unpatched zero-day vulnerability impacting multiple router models, as CISA warns that other router flaws have been exploited in attacks. The zero-day vulnerability was discovered by independent threat researcher Mehrun (ByteRay), who noted that he first reported it to TP-Link on May 11, 2024. The Chinese networking equipment giant confirmed to […]
WhatsApp patches vulnerability exploited in zero-day attacks
WhatsApp has patched a security vulnerability in its iOS and macOS messaging clients that was exploited in targeted zero-day attacks. The company says this zero-click flaw (tracked as CVE-2025-55177) affects WhatsApp for iOS prior to version 2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78. “Incomplete authorization of linked device synchronization messages in WhatsApp [..] […]
FreePBX servers hacked via zero-day, emergency fix released
The Sangoma FreePBX Security Team is warning about an actively exploited FreePBX zero-day vulnerability that impacts systems with the Administrator Control Panel (ACP) is exposed to the internet. FreePBX is an open-source PBX (Private Branch Exchange) platform built on top of Asterisk, widely used by businesses, call centers, and service providers to manage voice communications, […]
Citrix fixes critical NetScaler RCE flaw exploited in zero-day attacks
Citrix fixed three NetScaler ADC and NetScaler Gateway flaws today, including a critical remote code execution flaw tracked as CVE-2025-7775 that was actively exploited in attacks as a zero-day vulnerability. The CVE-2025-7775 flaw is a memory overflow bug that can lead to unauthenticated, remote code execution on vulnerable devices. In an advisory released today, Citrix states that this flaw […]
Apple fixes new zero-day flaw exploited in targeted attacks
Apple has released emergency updates to patch another zero-day vulnerability that was exploited in an “extremely sophisticated attack.” Tracked as CVE-2025-43300, this security flaw is caused by an out-of-bounds write weakness discovered by Apple security researchers in the Image I/O framework, which enables applications to read and write most image file formats. An out-of-bounds write occurs when […]
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 […]
CISA warns of N-able N-central flaws exploited in zero-day attacks
CISA warned on Wednesday that attackers are actively exploiting two security vulnerabilities in N‑able’s N-central remote monitoring and management (RMM) platform. N-central is commonly used by managed services providers (MSPs) and IT departments to monitor, manage, and maintain client networks and devices from a centralized web-based console. According to CISA, the two flaws can allow […]