CVE-2026-112158
Received Received - Intake

Integer Overflow in MikroTik RouterOS

Publication date: 2026-10-19

Last updated on: 2026-10-19

Assigner: VulDB

Description
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.

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Meta Information

Published
2026-10-19
Last Modified
2026-10-19
Generated
2026-10-19
AI Q&A
2026-10-19
EPSS Evaluated
N/A
NVD
CVE-2026-112158
EUVD
EUVD-2026-104417

Affected Vendors & Products

Showing 60 associated CPEs
Vendor Product Version / Range
MikroTik RouterOS 6.0
MikroTik RouterOS 6.1
MikroTik RouterOS 6.2
MikroTik RouterOS 6.3
MikroTik RouterOS 6.4
MikroTik RouterOS 6.5
MikroTik RouterOS 6.6
MikroTik RouterOS 6.7
MikroTik RouterOS 6.8
MikroTik RouterOS 6.9
MikroTik RouterOS 6.10
MikroTik RouterOS 6.11
MikroTik RouterOS 6.12
MikroTik RouterOS 6.13
MikroTik RouterOS 6.14
MikroTik RouterOS 6.15
MikroTik RouterOS 6.16
MikroTik RouterOS 6.17
MikroTik RouterOS 6.18
MikroTik RouterOS 6.19
MikroTik RouterOS 6.20
MikroTik RouterOS 6.21
MikroTik RouterOS 6.22
MikroTik RouterOS 6.23
MikroTik RouterOS 6.24
MikroTik RouterOS 6.25
MikroTik RouterOS 6.26
MikroTik RouterOS 6.27
MikroTik RouterOS 6.28
MikroTik RouterOS 6.29
MikroTik RouterOS 6.30
MikroTik RouterOS 6.31
MikroTik RouterOS 6.32
MikroTik RouterOS 6.33
MikroTik RouterOS 6.34
MikroTik RouterOS 6.35
MikroTik RouterOS 6.36
MikroTik RouterOS 6.37
MikroTik RouterOS 6.38
MikroTik RouterOS 6.39
MikroTik RouterOS 6.40
MikroTik RouterOS 6.40.0
MikroTik RouterOS 6.40.1
MikroTik RouterOS 6.40.2
MikroTik RouterOS 6.40.3
MikroTik RouterOS 6.40.4
MikroTik RouterOS 6.40.5
MikroTik RouterOS 6.41
MikroTik RouterOS 6.42
MikroTik RouterOS 6.43
MikroTik RouterOS 6.44
MikroTik RouterOS 7.20.0
MikroTik RouterOS 7.20.1
MikroTik RouterOS 7.20.2
MikroTik RouterOS 7.20.3
MikroTik RouterOS 7.20.4
MikroTik RouterOS 7.20.5
MikroTik RouterOS 7.20.6
MikroTik RouterOS 7.20.7
MikroTik RouterOS 7.20.8

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-189
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

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Executive Summary

This vulnerability is an integer overflow weakness in MikroTik RouterOS versions up to 6.40.5/6.44/7.20.8. It exists in the same_check function of the ipt_SAME.ko file. An attacker can remotely exploit this to cause an integer overflow, potentially leading to system instability or other unintended behavior.

Impact Analysis

The vulnerability allows remote attackers to manipulate the system, potentially causing crashes, data corruption, or unauthorized access. It may disrupt network operations, leading to downtime or security breaches. Upgrading to versions 7.21.5 or 7.23.1 is recommended to mitigate this risk.

Mitigation Strategies

Upgrade MikroTik RouterOS to version 7.21.5 or 7.23.1 or later to address the integer overflow vulnerability in the same_check function of ipt_SAME.ko.

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