Tag: zero-day
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Citrix Confirms NetScaler Zero-Day RCE Flaws Actively Exploited in Attacks
Citrix has released emergency security updates for NetScaler ADC and NetScaler Gateway after confirming active exploitation of two critical zero-day vulnerabilities, CVE-2026-88771 and CVE-2026-88772. Both bugs have a CVSS v4.0 score of 9.5 and can enable remote code execution (RCE) against vulnerable customer-managed appliances. The flaws are part of a wider set of eight vulnerabilities…
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Citrix Confirmed Two New NetScaler Flaws Exploited as Zero-Day
Citrix confirmed two critical NetScaler zero-days were exploited before patches were available, with attackers able to remotely execute code. Citrix confirmed that two critical zero-day vulnerabilities in NetScaler ADC and NetScaler Gateway were exploited before the company released patches. The flaws allow remote code execution, meaning attackers can potentially take control of affected appliances. The…
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Citrix confirms two NetScaler RCE zero-days exploited in attacks
Citrix has confirmed that two critical NetScaler remote code execution vulnerabilities, tracked as CVE-2026-88771 and CVE-2026-88772, are being exploited in attacks and that it has released security updates to fix the flaws. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/citrix-admins-warned-to-shut-down-netscalers-over-2-exploited-zero-days/
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Citrix admins warned to shut down NetScalers over 2 exploited zero-days
Two unpatched Citrix NetScaler zero-day vulnerabilities are reportedly being exploited in attacks, with cybersecurity agencies, security researchers, and IT providers privately warning organizations about the flaws ahead of patches expected next week. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/citrix-admins-warned-to-shut-down-netscalers-over-2-exploited-zero-days/
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Warning: Two Unpatched Citrix NetScaler RCE Zero-Days Under Active Exploitation
Two new unpatched zero-day vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway appliances that allow remote code execution are being actively exploited in the wild, security firm watchTowr said on September 26.Citrix has not confirmed the flaws or published a fix. Some administrators say they have taken appliances offline rather than wait for one to…
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Attackers Bypass WAFs to Exploit Oracle PeopleSoft Flaw and Deploy Web Shells
Google is warning of renewed mass exploitation of a known security vulnerability in Oracle PeopleSoft as part of a campaign targeting multiple sectors globally.The ShinyHunters-linked activity involves the weaponization of CVE-2026-35273 (CVSS score: 9.8), a critical security flaw that could result in unauthenticated remote code execution.The vulnerability was first exploited as a zero-day First seen…
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Kiteworks Warns Users to Take Systems Offline Amid Suspected Zero-Day Threat
Kiteworks has urged customers worldwide to temporarily shut down their servers after receiving credible law-enforcement intelligence that a threat actor may target Kiteworks deployments over the weekend. The emergency advisory is preventive, but the company said the potential activity may involve an unknown zero-day vulnerability. The secure file-sharing and managed content communications provider asked organizations…
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Kiteworks urges 6-hour server shutdown over potential zero-day attacks
Secure file-sharing software company Kiteworks is urging customers worldwide to temporarily shut down their servers on Saturday for a six-hour window after receiving threat intelligence warning of a potentially imminent cyberattack. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/kiteworks-urges-6-hour-server-shutdown-over-potential-zero-day-attacks/
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Expecting cyber attack, Kiteworks tells users to turn off servers
An as-yet undisclosed zero-day vulnerability has prompted managed file transfer provider Kiteworks to tell users to preemptively switch off their servers. First seen on computerweekly.com Jump to article: www.computerweekly.com/news/366651301/Expecting-cyber-attack-Kiteworks-tells-users-to-turn-off-servers
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Zero-Days, AI Agents, and Identity Attacks Define Cybersecurity Week
Weekly summary of Cybersecurity Insider newsletters First seen on esecurityplanet.com Jump to article: www.esecurityplanet.com/weekly-roundup/zero-days-ai-agents-and-identity-attacks-define-cybersecurity-week/
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Hackers Exploit Check Point VPN RCE and Management Zero-Day in Attacks
Tags: attack, authentication, cve, cvss, cyber, exploit, flaw, hacker, rce, remote-code-execution, update, vpn, vulnerability, zero-dayCheck Point has warned customers about the active exploitation of two critical vulnerabilities in its VPN gateway and Security Management products: CVE-2026-85102 and the newly disclosed CVE-2026-93616. Both vulnerabilities have a CVSS score of 9.8 and allow for pre-authentication attacks, making immediate patching and reducing exposure essential. Check Point Flaws CVE-2026-85102 is an improper certificate-validation…
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ShinyHunters claims FBI hack, data theft in PeopleSoft zero-day breach
The ShinyHunters extortion gang claims it breached FBI systems using a new Oracle PeopleSoft zero-day vulnerability, gaining access to internal services and stealing sensitive data on employees and job applicants. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/shinyhunters-claims-fbi-hack-data-theft-in-peoplesoft-zero-day-breach/
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Check Point Warns of Management Server Zero-Day Exploited in Targeted Attacks
Attackers exploited a previously unknown flaw in Check Point’s Security Management Server in a handful of targeted attacks on July 23, the company said.The flaw, CVE-2026-93616, allows an attacker who can access the server’s web service to run scripts on it without logging in. Check Point released a fix on September 22 for the server…
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Researcher Drops BigDiskBuster Zero-Day PoC That Blocks Microsoft Defender Updates
A zero-day proof-of-concept tool that stops Microsoft Defender from installing platform and signature updates by filling all available disk space was published on GitHub on September 19.The tool, called BigDiskBuster, has no patch, no CVE, and no Microsoft advisory. Its author, Abdelhamid Naceri, is a former Microsoft security researcher whose earlier Defender exploits were used…
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Check Point warns of Management Server zero-day exploited in attacks
Check Point Software released emergency hotfixes to address a critical Security Management Server vulnerability that could let attackers run arbitrary scripts. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/check-point-patches-management-server-zero-day-exploited-in-attacks/
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Chaotic Eclipse Released BigDiskBuster, A PoC For Windows Defender Update DoS Zero-Day
The researcher Chaotic Eclipse released BigDiskBuster, a PoC exploit for a Windows Defender UpdateDoS Zero-Day vulnerability. Security researcher Chaotic Eclipse, also known as INFINITE NIGHTMARE, MSNightmare and Nightmare-Eclipse, released a new zero-day exploit targeting Microsoft Defender. The researcher named the exploit BigDiskBuster, it triggers a Denial of Service Vulnerability in Windows Defender Update. The security researcher…
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D-Link warns of max severity zero-day bug in DIR-822A routers
D-Link warned customers of a maximum-severity vulnerability (CVE-2026-86296) with public proof-of-concept (PoC) exploit code and no patch, affecting legacy DIR-822A dual-band Wi-Fi routers. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/d-link-warns-of-max-severity-zero-day-bug-in-dir-822a-routers/
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New Windows Defender zero-day blocks Microsoft antivirus updates
Over the weekend, security researcher Abdelhamid Naceri (also known as Nightmare Eclipse) released another Microsoft Defender zero-day exploit that blocks antivirus updates. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/new-windows-defender-zero-day-blocks-microsoft-antivirus-updates/
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Forscher eskaliert weiter: Zero-Day-Exploit trickst den Windows Defender aus
Ein neuer Exploit von Nightmare Eclipse hindert den Windows Defender daran, sich zu aktualisieren. Das ermöglicht weiterführende Angriffe. First seen on golem.de Jump to article: www.golem.de/news/forscher-eskaliert-weiter-zero-day-exploit-trickst-den-windows-defender-aus-2609-213306.html
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Chinese APT Clones Legitimate Websites to Deliver Chrome and Windows Zero-Day Exploits
A third Chinese threat actor has been linked to phishing campaigns that cloned trusted websites and chained Chrome and Windows zero-day exploits to deploy a previously undocumented backdoor. The activity occurred on September 3 and 4, 2026, while the targeted vulnerabilities remained unpatched in Google Chrome. It followed Volexity’s September 9 disclosure that UTA0560 and…
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Meta’s Muse AI 0-Day Lets Hackers Hijack Dictation Traffic and Inject Malicious Prompts
A recent proof-of-concept (PoC) developed by security researcher Patrick Wardle reveals a local zero-day vulnerability in the Muse application. This vulnerability allows malware running under the logged-in user’s account to redirect dictation traffic to a server controlled by an attacker. Meta’s Muse AI 0-Day The issue is documented in Wardle’s >>not-a-mused<< research repository. It focuses…
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Muse, Meta’s extraordinarily privileged AI assistant, has a serious 0-day
A simple ClickFix attack is only one way to completely hijack the new agent. First seen on arstechnica.com Jump to article: arstechnica.com/security/2026/09/muse-metas-extraordinarily-privileged-ai-assistant-has-a-serious-0-day/
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âš¡ Weekly Recap: Cisco 0-Day, AI Agent RCE, ClickFix Attacks, ClickFix Surge, and Browser Hijacks
A browser. A plugin. A package. A login screen. Normal stuff. That is basically the problem this week.The trouble keeps showing up inside things people already trust: code that takes a bad turn, old payloads coming back, exposed systems, weak checks, fake fixes, and attack paths that look almost too easy. Even the research side…
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NightEagle Uses BlueKeep and DCSync to Move Toward Active Directory Domain Controllers
NightEagle, an espionage-focused threat group also tracked as APT-Q-95, has expanded its operations from Asian targets to Russian organizations, using a layered intrusion chain that culminates in attempts to compromise Active Directory domain controllers. The campaign illustrates a familiar but dangerous enterprise compromise pattern: attackers do not need a novel zero-day exploit when exposed remote…
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(g+) Windows-Lücken: Die Rückkehr der Würmer
Laut Zero Day Initiative sind 20 der neuen Windows-Lücken wurmfähig. Was Wannacry lehrt und was Admins absichern. First seen on golem.de Jump to article: www.golem.de/news/windows-luecken-die-rueckkehr-der-wuermer-2609-213269.html
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Week in review: Cisco patches exploited email gateway 0-day, Revolut breach
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: What we know about the Revolut data breach so far Someone impersonating a … First seen on helpnetsecurity.com Jump to article: www.helpnetsecurity.com/2026/09/20/week-in-review-cisco-patches-exploited-email-gateway-0-day-revolut-breach/
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Cisco Zero-Day Highlights API Endpoint Authentication Issues
The authentication bypass flaw CVE-2026-76460 impacts Cisco’s Identity Services Engine (ISE) and received a maximum 10 out of 10 CVSS score. First seen on darkreading.com Jump to article: www.darkreading.com/vulnerabilities-threats/cisco-zero-day-api-endpoint-authentication-issues
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Zero-Days, AI Agents, and Massive Data Leaks Define the Week
Weekly summary of Cybersecurity Insider newsletters First seen on esecurityplanet.com Jump to article: www.esecurityplanet.com/weekly-roundup/zero-days-ai-agents-and-massive-data-leaks-define-the-week/
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CISA Gives Agencies 3 Days to Patch Exploited Pixel Zero-Day
Google says a Pixel modem zero-day was under targeted exploitation. CISA has added CVE-2026-58704 to KEV as users are urged to patch. The post CISA Gives Agencies 3 Days to Patch Exploited Pixel Zero-Day appeared first on TechRepublic. First seen on techrepublic.com Jump to article: www.techrepublic.com/article/news-google-pixel-modem-zero-day-cve-2026-58704/
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Cisco alerts customers to second actively exploited zero-day in as many days
The latest zero-day has a maximum-severity rating and affects Cisco Identity Services Engine, a product hit with three actively exploited vulnerabilities since June 2025. First seen on cyberscoop.com Jump to article: cyberscoop.com/cisco-ise-zero-day-cve-2026-76460/