CVE-2026-84411
criticalThe web management service in affected RouterOS versions contains an integer underflow in its HTTP request body handling that is reachable before authenticatio…
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (ics-cert@hq.dhs.gov)
Timeline (UTC)
Published: 2026-10-02 23:16
Modified: 2026-10-06 15:15
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 06:57 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-272-06.json ics-cert@hq.dhs.gov
- https://mikrotik.com/download ics-cert@hq.dhs.gov
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-272-06 ics-cert@hq.dhs.gov
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:57 UTC · record ↗