CRITICAL 9.3 NVD
CVE-2026-84411
The web management service in affected RouterOS versions contains an integer underflow in its HTTP request body handling that is reachable before authentication
The web management service in affected RouterOS versions contains an integer underflow in its HTTP request body handling that is reachable before authentication. This can be leveraged by an unauthenticated network attacker to achieve arbitrary code execution as root, or to cause a denial of service, using a single crafted request.
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-272-06.json
- https://mikrotik.com/download
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-272-06
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-10-02 via NVD.
Risk Timeline
CVE Disclosed2026-10-02 · 0 days ago
Remediation Resources
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