[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fEEB2ikNjcfkp8SYBMrvhBjNyGEUgmiC5FQipsgp4T_o":3},{"article":4,"iocs":42,"watch_terms":47,"solutions":48,"lesson":134},{"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":25,"category":26,"article_tags":29},"fd1e93ef-6d3a-4158-bffd-67f6feba37f3","MikroTik RouterOS and Cloud Hosted Router","mikrotik-routeros-and-cloud-hosted-router-1aabbd","View CSAF Summary Successful exploitation of this vulnerability could allow attackers to rapidly guess passwords and gain unauthorized system access. The following versions of MikroTik RouterOS and Cloud Hosted Router are affected: RouterOS vers:all\u002F* (CVE-2026-16347) Cloud Hosted Router vers:all\u002F* (CVE-2026-16347) CVSS Vendor Equipment Vulnerabilities v3 8.8 MikroTik MikroTik RouterOS and Cloud Hosted Router Improper Restriction of Excessive Authentication Attempts Background Critical Infrastructure Sectors: Information Technology, Commercial Facilities Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: Latvia Vulnerabilities Expand All + CVE-2026-16347 MikroTik RouterOS contains a weakness in its API authentication handling that lacks effective safeguards against excessive login attempts. The system does not enforce meaningful rate-limiting, account lockout, or source-based restrictions, allowing repeated authentication failures to proceed without defensive response. In some versions, a fixed per-connection delay is present, but it can be bypassed through concurrent sessions, resulting in continued high-volume attempts. This deficiency increases the risk that an attacker could eventually obtain valid credentials and gain unauthorized access to administrative services. View CVE Details Affected Products MikroTik RouterOS and Cloud Hosted Router Vendor: MikroTik Product Version: MikroTik RouterOS: vers:all\u002F*, MikroTik Cloud Hosted Router: vers:all\u002F* Product Status: known_affected Remediations Mitigation No fix is currently available from MikroTik. Until a fix is available, MikroTik recommends that users adopt the following mitigations: Use a strong VPN or other additional protection layer if the API is exposed to public networks. Mitigation Configure the unsuccessful-attempt time range (0.1 to 0.5 seconds) in \u002Fip service for all services, including the API, once available. Mitigation Connect initially from a trusted network (LAN) port only, then configure the router per your security requirements. Mitigation Restrict\u002Flimit access to management services from untrusted networks. Mitigation Apply firewall rules to control and restrict access to management services where possible. Mitigation Use long, randomly generated passwords rather than weak or default-simple ones, to keep the brute-force search space impractically large. Mitigation Keep the default randomly generated device password, or replace it with an equally strong one, since minimum complexity isn't enforced by default. Mitigation Users are encouraged to reach out to MikroTik (https:\u002F\u002Fmikrotik.com\u002Fsupport) for further support. https:\u002F\u002Fmikrotik.com\u002Fsupport Relevant CWE: CWE-307 Improper Restriction of Excessive Authentication Attempts Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1\u002FAV:A\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H 4.0 8.7 HIGH CVSS:4.0\u002FAV:A\u002FAC:L\u002FAT:N\u002FPR:N\u002FUI:N\u002FVC:H\u002FVI:H\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N Acknowledgments Andre Santos of União Geek reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https:\u002F\u002Fwww.cisa.gov\u002Fnotification) and this Privacy & Use policy (https:\u002F\u002Fwww.cisa.gov\u002Fprivacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and\u002For systems, ensuring they are not accessible from the internet. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov\u002Fics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov\u002Fics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely. Revision History Initial Release Date: 2026-07-28 Date Revision Summary 2026-07-28 1 Initial Publication Legal Notice and Terms of Use","MikroTik RouterOS and Cloud Hosted Router are affected by CVE-2026-16347, a vulnerability allowing attackers to guess passwords and gain unauthorized access. The flaw stems from inadequate safeguards against excessive login attempts, such as rate-limiting or account lockout. While no fix is currently available, MikroTik recommends mitigations including VPN usage, restricting network access, and employing strong passwords.","MikroTik RouterOS and Cloud Hosted Router vulnerable to password guessing attacks.","https:\u002F\u002Fwww.cisa.gov\u002Fnews-events\u002Fics-advisories\u002Ficsa-26-209-05",null,"2026-07-28T12:00:00+00:00","2026-07-28T16:00:14.101573+00:00",8,[17,20,22],{"name":18,"type":19},"RouterOS","product",{"name":21,"type":19},"Cloud Hosted Router",{"name":23,"type":24},"MikroTik","vendor","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":25,"icon":12,"name":27,"slug":28},"Vulnerabilities","vulnerabilities",[30,32,37],{"category":31},{"id":25,"icon":12,"name":27,"slug":28},{"category":33},{"id":34,"icon":12,"name":35,"slug":36},"d6f63bb8-0801-486a-be7f-171400700454","IoT\u002FOT","iot-ot",{"category":38},{"id":39,"icon":12,"name":40,"slug":41},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[43],{"type":44,"value":45,"context":46},"cve","CVE-2026-16347","Vulnerability in MikroTik RouterOS and Cloud Hosted Router",[23,18,21],{"controls":49,"vendors":133},[50,78,107],{"slug":51,"name":52,"problem":53,"products":54},"privileged-access-management","Privileged access management (PAM)","Admin accounts stop being one stolen password away from control of everything.",[55,63,71],{"vendor_slug":56,"vendor_name":57,"vendor_logo":58,"product_slug":59,"product_name":60,"url":61,"description":62},"palo-alto-networks","Palo Alto Networks","\u002Fvendor-logos\u002Fpalo-alto-networks.png","idira-privileged-access-management","Idira Privileged Access Management","https:\u002F\u002Fwww.paloaltonetworks.com\u002Fidira\u002Fhuman\u002Fprivileged-access-management","Privileged access management from the former CyberArk portfolio: vaulting, rotation, just-in-time access and session monitoring.",{"vendor_slug":64,"vendor_name":65,"vendor_logo":66,"product_slug":67,"product_name":68,"url":69,"description":70},"wallix","WALLIX","\u002Fvendor-logos\u002Fwallix.png","wallix-pam","WALLIX PAM","https:\u002F\u002Fwww.wallix.com\u002Fproducts\u002Fprivileged-access-management-software\u002F","Privileged access management with session recording, for IT and OT environments.",{"vendor_slug":72,"vendor_name":73,"vendor_logo":74,"product_slug":51,"product_name":75,"url":76,"description":77},"threatlocker","ThreatLocker","\u002Fvendor-logos\u002Fthreatlocker.png","Privileged Access Management","https:\u002F\u002Fwww.threatlocker.com\u002Fcapabilities\u002Fprivileged-access-management","Gives elevated rights to specific applications only where needed, so users do not need local admin accounts.",{"slug":79,"name":80,"problem":81,"products":82},"identity-threat-detection","Identity threat detection and response (ITDR)","Attackers who log in with real, stolen credentials get noticed.",[83,91,99],{"vendor_slug":84,"vendor_name":85,"vendor_logo":86,"product_slug":87,"product_name":88,"url":89,"description":90},"okta","Okta","\u002Fvendor-logos\u002Fokta.png","identity-threat-protection","Okta Identity Threat Protection","https:\u002F\u002Fwww.okta.com\u002Fproducts\u002Fidentity-threat-protection\u002F","Continuous risk assessment of sessions after login, with automatic actions such as ending sessions.",{"vendor_slug":92,"vendor_name":93,"vendor_logo":94,"product_slug":95,"product_name":96,"url":97,"description":98},"acalvio","Acalvio","\u002Fvendor-logos\u002Facalvio.png","shadowplex-identity-protection","ShadowPlex Identity Protection","https:\u002F\u002Fwww.acalvio.com\u002Fproducts\u002Fidentity-protection\u002F","Decoy accounts and credentials that expose identity attacks and credential misuse early.",{"vendor_slug":100,"vendor_name":101,"vendor_logo":102,"product_slug":103,"product_name":104,"url":105,"description":106},"vectra-ai","Vectra AI","\u002Fvendor-logos\u002Fvectra-ai.png","vectra-ai-platform","Vectra AI Platform","https:\u002F\u002Fwww.vectra.ai\u002Fplatform","Detection of attacker behaviour across network, identity and cloud.",{"slug":108,"name":109,"problem":110,"products":111},"firewall","Next-generation firewall and intrusion prevention","Malicious traffic is blocked at the network edge and between zones.",[112,120,125],{"vendor_slug":113,"vendor_name":114,"vendor_logo":115,"product_slug":116,"product_name":117,"url":118,"description":119},"fortinet","Fortinet","\u002Fvendor-logos\u002Ffortinet.png","fortigate","FortiGate","https:\u002F\u002Fwww.fortinet.com\u002Fproducts\u002Fnext-generation-firewall","Next-generation firewalls with intrusion prevention and SD-WAN.",{"vendor_slug":56,"vendor_name":57,"vendor_logo":58,"product_slug":121,"product_name":122,"url":123,"description":124},"next-generation-firewall","Next-Generation Firewalls","https:\u002F\u002Fwww.paloaltonetworks.com\u002Fnetwork-security\u002Fnext-generation-firewall","Hardware, virtual and cloud firewalls running PAN-OS, with intrusion prevention.",{"vendor_slug":126,"vendor_name":127,"vendor_logo":128,"product_slug":129,"product_name":130,"url":131,"description":132},"cisco","Cisco","\u002Fvendor-logos\u002Fcisco.png","secure-firewall","Cisco Secure Firewall","https:\u002F\u002Fwww.cisco.com\u002Fsite\u002Fus\u002Fen\u002Fproducts\u002Fsecurity\u002Ffirewalls\u002Findex.html","Next-generation firewalls with intrusion prevention, using Talos threat intelligence.",[],{"slug":135,"title":136,"body":137,"framework_refs":138,"framework_notes":151},"mikrotik-routeros-vulnerable-to-password-guessing-attacks-due-to-missing-login-protections","MikroTik RouterOS Vulnerable to Password Guessing Attacks Due to Missing Login Protections","CVE-2026-16347 exposes MikroTik RouterOS and Cloud Hosted Router to brute-force and password-guessing attacks due to the absence of rate-limiting and account lockout mechanisms — fundamental access control safeguards. Without these controls, attackers can make unlimited login attempts until they successfully guess credentials, potentially gaining full administrative access to network infrastructure. This is especially critical because routers sit at the perimeter of networks, meaning compromise could expose all downstream systems. The absence of an available patch makes compensating controls — such as VPN-gated access and strong password policies — essential in the interim. Organizations relying solely on the vendor for remediation without implementing mitigations are accepting significant, unmanaged risk.",[139,140,141,142,143,144,145,146,147,148,149,150],"CIS Control 4: Secure Configuration of Enterprise Assets and Software","CIS Control 5: Account Management","CIS Control 12: Network Infrastructure Management","CIS Control 17: Incident Response Management","NIST SP 800-53 AC-7: Unsuccessful Logon Attempts","NIST SP 800-53 AC-17: Remote Access","NIST SP 800-53 SI-2: Flaw Remediation","NIST SP 800-53 SC-7: Boundary Protection","NIST CSF ID.RA-1: Asset Vulnerabilities Identified","NIST CSF PR.AC-3: Remote Access Managed","ISO\u002FIEC 27001 A.9.4.2: Secure Log-on Procedures","ISO\u002FIEC 27001 A.12.6.1: Management of Technical Vulnerabilities",{}]