Medium 6.5Published Oct 19, 2026

CVE-2026-112158MikroTik RouterOS ipt_SAME.ko same_check integer overflow

Updated under an hour ago (2026-10-21 03:10 UTC)

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It affects MikroTik RouterOS. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for MikroTik RouterOS

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:X/RL:O/RC:C
Weakness (CWE): CWE-190, CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

MikroTik RouterOS mikrotik:routeros	6.0; 6.1; 6.2; 6.3; 6.4; 6.5; 6.6; 6.7; and 54 more ranges	CNA record

References

https://vuldb.com/vuln/422285vdb-entry, technical-description
https://vuldb.com/vuln/422285/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-112158third-party-advisory
https://vuldb.com/submit/956852third-party-advisory
https://github.com/MeetFireAgain/cve/mikrotik/routeros-ipt-same-integer-overflow-brick.mdbroken-link

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.