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Δ / VULNERABILITY RECORD

CVE-2026-84411.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSCRITICAL / 9.3CVSS 4.0 · ics-cert@hq.dhs.gov
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSAwaiting AnalysisModified Oct 06, 2026

Disclosure summary

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.

Source-reported weakness categories

CWE-191

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2026-84411

Open original source · Updated Oct 06, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Original records & references

PUBLISHED 2026-10-02T19:16:58-04:00
MODIFIED 2026-10-06T11:15:48-04:00
INGESTED 2026-10-06T11:45:30-04:00