CVE-2026-112158: Integer Overflow in MikroTik RouterOS
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.
CVSS v4.0
Score 7.1high
Affected software
MikroTik
RouterOS
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow in the same_check function within the ipt_SAME.ko module of MikroTik RouterOS. The flaw affects all versions up to and including 6.40.5, 6.44, and 7.20.8. An attacker can remotely manipulate inputs to trigger the overflow, potentially leading to security impacts as indicated by the high CVSS score of 7.1. The vendor recommends upgrading to versions 7.21.5 or 7.23.1 to address the vulnerability.
Potential Impact
The integer overflow vulnerability allows remote attackers to manipulate the affected function, which may lead to security impacts consistent with a high severity rating. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Upgrade MikroTik RouterOS to version 7.21.5 or 7.23.1 as these versions contain fixes for the integer overflow vulnerability. No other mitigation steps are specified. Patch status is confirmed by the vendor's recommended upgrade versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-10-19T07:05:54.496Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad643052cdf04f6566afddf
Added to database: 10/19/2026, 16:19:17 UTC
Last enriched: 10/19/2026, 16:33:19 UTC
Last updated: 10/19/2026, 17:19:11 UTC
Views: 5
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