[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ffr6XxubK91eO3QoEebKLnHINnqncBFFhGX7lDaPvGg4":3},{"article":4,"iocs":51,"watch_terms":56,"solutions":57,"lesson":144},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":28,"category":29,"article_tags":33},"19818796-4e71-49ec-9ae6-fbee82246317","Protecting Against Zero-Click Attacks","protecting-against-zero-click-attacks-f8624b","By Aimee Steele, threat intelligence analyst at Talion Cyber Security Last month, the UK’s National Cyber Security Centre (NCSC) issued an advisory around a new phishing campaign targeting organisations in the West that was being carried out by the Russian state-sponsored threat actor known as Laundry Bear. The campaign, saw the threat actors exploiting a […] The post Protecting Against Zero-Click Attacks appeared first on IT Security Guru.","Russian state-sponsored threat actor Laundry Bear exploited a zero-day XSS vulnerability in Zimbra Collaboration Suite to conduct espionage against critical industries in the West. The attack, which required no user interaction beyond opening an email, allowed attackers to gain persistence, access emails, and steal sensitive data. Zimbra has released patches, and advisories were issued by the UK's NCSC and 15 other countries.","Laundry Bear exploits Zimbra zero-day for espionage against Western organizations.","https:\u002F\u002Fwww.itsecurityguru.org\u002F2026\u002F09\u002F04\u002Fprotecting-against-zero-click-attacks\u002F?utm_source=rss&utm_medium=rss&utm_campaign=protecting-against-zero-click-attacks","https:\u002F\u002Fwww.itsecurityguru.org\u002Fwp-content\u002Fuploads\u002F2026\u002F09\u002FChatGPT-Image-Sep-4-2026-11_34_54-AM.png","2026-09-04T10:35:56+00:00","2026-09-04T14:00:11.244799+00:00",9,[17,20,23,25],{"name":18,"type":19},"Laundry Bear","threat_actor",{"name":21,"type":22},"Zimbra Collaboration Suite","product",{"name":24,"type":22},"Zimbra Mailservers",{"name":26,"type":27},"Zimbra","vendor","574f766a-fb3f-487c-8d2c-0720ae75471b",{"id":28,"icon":30,"name":31,"slug":32},null,"Zero-day","zero-day",[34,36,41,46],{"category":35},{"id":28,"icon":30,"name":31,"slug":32},{"category":37},{"id":38,"icon":30,"name":39,"slug":40},"6cbdd207-aaa1-4176-9534-e156b125e917","Nation-state","nation-state",{"category":42},{"id":43,"icon":30,"name":44,"slug":45},"80544778-fabb-4dcd-aa35-17492e5dcf4f","Vulnerabilities","vulnerabilities",{"category":47},{"id":48,"icon":30,"name":49,"slug":50},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[52],{"type":53,"value":54,"context":55},"cve","CVE-2025-66376","Zero-day XSS vulnerability in Zimbra Collaboration Suite exploited by Laundry Bear.",[26,21,24],{"controls":58,"vendors":143},[59,88,114],{"slug":60,"name":61,"problem":62,"products":63},"patch-management","Automated patch management","Known holes get closed in days, not months.",[64,72,80],{"vendor_slug":65,"vendor_name":66,"vendor_logo":67,"product_slug":68,"product_name":69,"url":70,"description":71},"ninjaone","NinjaOne","\u002Fvendor-logos\u002Fninjaone.png","ninjaone-patch-management","NinjaOne Patch Management","https:\u002F\u002Fwww.ninjaone.com\u002Fpatch-management\u002F","Automated patching of operating systems and third-party applications from the cloud.",{"vendor_slug":73,"vendor_name":74,"vendor_logo":75,"product_slug":76,"product_name":77,"url":78,"description":79},"action1","Action1","\u002Fvendor-logos\u002Faction1.png","action1-patch-management","Action1 Patch Management","https:\u002F\u002Fwww.action1.com\u002F","Cloud-native patch management for Windows, macOS and third-party applications.",{"vendor_slug":81,"vendor_name":82,"vendor_logo":83,"product_slug":84,"product_name":85,"url":86,"description":87},"microsoft","Microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","intune","Microsoft Intune","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fmicrosoft-intune","Device management for Windows, macOS, iOS and Android, including update rings and compliance policies.",{"slug":89,"name":90,"problem":91,"products":92},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",[93,101,109],{"vendor_slug":94,"vendor_name":95,"vendor_logo":96,"product_slug":97,"product_name":98,"url":99,"description":100},"crowdstrike","CrowdStrike","\u002Fvendor-logos\u002Fcrowdstrike.png","falcon-insight-xdr","Falcon Insight XDR","https:\u002F\u002Fwww.crowdstrike.com\u002Fen-us\u002Fplatform\u002Fendpoint-security\u002Ffalcon-insight-xdr\u002F","Endpoint detection and response with extended detection across other security tools.",{"vendor_slug":102,"vendor_name":103,"vendor_logo":104,"product_slug":105,"product_name":106,"url":107,"description":108},"huntress","Huntress","\u002Fvendor-logos\u002Fhuntress.png","managed-edr","Huntress Managed EDR","https:\u002F\u002Fwww.huntress.com\u002Fplatform\u002Fmanaged-edr","Endpoint detection and response monitored around the clock by Huntress analysts.",{"vendor_slug":81,"vendor_name":82,"vendor_logo":83,"product_slug":110,"product_name":111,"url":112,"description":113},"defender-for-endpoint","Microsoft Defender for Endpoint","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fendpoint-security\u002Fmicrosoft-defender-endpoint","Endpoint detection and response for Windows, macOS, Linux and mobile devices.",{"slug":115,"name":116,"problem":117,"products":118},"email-security","Email security","Phishing, malware and invoice fraud are filtered out before they reach inboxes.",[119,127,135],{"vendor_slug":120,"vendor_name":121,"vendor_logo":122,"product_slug":123,"product_name":124,"url":125,"description":126},"check-point","Check Point","\u002Fvendor-logos\u002Fcheck-point.png","harmony-email","Harmony Email & Collaboration","https:\u002F\u002Fwww.checkpoint.com\u002Fharmony\u002Femail-security\u002F","Email and collaboration security for Microsoft 365 and Google Workspace.",{"vendor_slug":128,"vendor_name":129,"vendor_logo":130,"product_slug":131,"product_name":132,"url":133,"description":134},"cloudflare","Cloudflare","\u002Fvendor-logos\u002Fcloudflare.png","cloudflare-email-security","Cloudflare Email Security","https:\u002F\u002Fwww.cloudflare.com\u002Fsase\u002Fproducts\u002Femail-security\u002F","Email filtering for phishing and business email compromise.",{"vendor_slug":136,"vendor_name":137,"vendor_logo":138,"product_slug":139,"product_name":140,"url":141,"description":142},"abnormal","Abnormal AI","\u002Fvendor-logos\u002Fabnormal.png","abnormal-email-security","Abnormal Inbound Email Security","https:\u002F\u002Fabnormal.ai\u002F","API-based email security for Microsoft 365 and Google Workspace using behavioural models.",[],{"slug":145,"title":146,"body":147,"framework_refs":148,"framework_notes":161},"zero-click-zimbra-exploit-highlights-patch-urgency-for-critical-infrastructure","Zero-Click Zimbra Exploit Highlights Patch Urgency for Critical Infrastructure","Russian state-sponsored actors exploited a zero-day XSS vulnerability in Zimbra Collaboration Suite, requiring no user interaction to compromise target systems — simply receiving and opening an email was sufficient to trigger the attack. This allowed attackers to establish persistence, exfiltrate sensitive emails, and conduct espionage against critical industries across Western nations. The incident underscores the extreme risk posed by unpatched internet-facing communication platforms, especially those processing sensitive organisational data. Zero-click vulnerabilities are particularly dangerous because traditional security awareness training offers no meaningful defence — technical controls and rapid patching are the only effective mitigations. The coordinated advisory from NCSC and 15 allied nations signals the severity and breadth of the campaign's impact.",[149,150,151,152,153,154,155,156,157,158,159,160],"CIS Control 7: Continuous Vulnerability Management","CIS Control 12: Network Infrastructure Management","CIS Control 13: Network Monitoring and Defence","NIST SP 800-53 SI-2: Flaw Remediation","NIST SP 800-53 SI-3: Malicious Code Protection","NIST SP 800-53 AC-17: Remote Access","NIST SP 800-53 AU-6: Audit Record Review and Analysis","NIST CSF ID.RA-1: Asset Vulnerabilities Identified","NIST CSF RS.MI-3: Newly Identified Vulnerabilities Mitigated","ITIL: Change and Release Management (Emergency Change procedures)","GDPR Article 32: Security of Processing (appropriate technical measures)","NCSC Cyber Essentials: Patch Management and Boundary Firewalls",{}]