Integer overflow in Mikrotik Routeros
CVE-2026-112158
A weakness has been identified in MikroTik RouterOS up to 6.40.5/6.44/7.20.8. Impacted is the function same_check of the file ipt_SAME.ko. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. Upgrading to version 7.21.5 and 7.23.1 is recommended to address this issue. You should upgrade the affected component.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Mikrotik Routeros — versions 6.0, 6.1, 6.10
Weakness classification (CWE)
References
- github.com/MeetFireAgain/cve/mikrotik/routeros-ipt-same-integer-overflow-brick… (broken-link)
- vuldb.com/cve/CVE-2026-112158 (third-party-advisory)
- vuldb.com/submit/956852 (third-party-advisory)
- vuldb.com/vuln/422285 (technical-description, vdb-entry)
- vuldb.com/vuln/422285/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-112158?
- CVE-2026-112158 is a medium-severity vulnerability in Mikrotik Routeros, classified under CWE-189. CVSS score: 6.5/10. Published 2026-10-19.
- How severe is CVE-2026-112158?
- Medium severity. CVSS v3 base score is 6.5 out of 10.