0day
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 [..] […]
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 […]
Microsoft August 2025 Patch Tuesday fixes one zero-day, 107 flaws
Today is Microsoft’s August 2025 Patch Tuesday, which includes security updates for 107 flaws, including one publicly disclosed zero-day vulnerability in Windows Kerberos. This Patch Tuesday also fixes thirteen “Critical” vulnerabilities, nine of which are remote code execution vulnerabilities, three are information disclosure, and one is elevation of privileges. The number of bugs in each […]
Details emerge on WinRAR zero-day attacks that infected PCs with malware
Researchers have released a report detailing how a recent WinRAR path traversal vulnerability tracked as CVE-2025-8088 was exploited in zero-day attacks by the Russian ‘RomCom’ hacking group to drop different malware payloads. RomCom (aka Storm-0978 and Tropical Scorpius) is a Russian cyberespionage threat group with a history in zero-day exploitation, including in Firefox (CVE-2024-9680, CVE-2024-49039) and Microsoft Office (CVE-2023-36884). ESET […]
Trend Micro warns of Apex One zero-day exploited in attacks
Trend Micro has warned customers to immediately secure their systems against an actively exploited remote code execution vulnerability in its Apex One endpoint security platform. Apex One is an endpoint security platform designed to automatically detect and respond to threats, including malicious tools, malware, and vulnerabilities. This critical security flaw (tracked as CVE-2025-54948 and CVE-2025-54987 depending on the CPU architecture) […]
Adobe issues emergency fixes for AEM Forms zero-days after PoCs released
Adobe released emergency updates for two zero-day flaws in Adobe Experience Manager (AEM) Forms on JEE after a PoC exploit chain was disclosed that can be used for unauthenticated, remote code execution on vulnerable instances. The flaws are tracked as CVE-2025-54253 and CVE-2025-54254: Adobe has fixed the flaws in the latest versions as described in this advisory. The vulnerabilities […]